🪞The Large Hadron Collider exposes quarks’ quantum entanglement:
Top quarks and antiquarks can be linked, a CERN study shows🪞
Link
@PDATLAB
Top quarks and antiquarks can be linked, a CERN study shows🪞
Link
@PDATLAB
Science News
The Large Hadron Collider exposes quarks’ quantum entanglement
Top quarks and antiquarks produced in the Large Hadron Collider are entangled, a study shows.
✳️ Square Kilometer Array, world’s largest radio telescope in making, becomes partially functional ✳️
Link
@PDATLAB
Link
@PDATLAB
The Indian Express
Square Kilometer Array, world’s largest radio telescope in making, becomes partially functional
Square Kilometer Array or SKA is an international science project with headquarters in UK; India became a member of SKA in December 2022.
Forwarded from Particle Physics (Fatemeh Irani)
«سیری در نظریه پیچیدگی» کتابی از ملانی میچل است که به دنیای پیچیده سیستمهای پیچیده میپردازد.
این کتاب، که توسط رضا امیر رحیمی به فارسی ترجمه شده، به بررسی ایدههای بنیادی سیستمهای پیچیده، تحقیقات پیشرفته در این زمینه و تأثیر بالقوه نظریهی پیچیدگی در حل مسائل دنیای واقعی میپردازد.
لینک زیر جلسات بحث در مورد این کتاب در دانشکدهی اقتصاد دانشگاه تهران است:
https://youtu.be/CRH1cHi8UWE?si=wrA88fbyS7bZCAs4
این کتاب، که توسط رضا امیر رحیمی به فارسی ترجمه شده، به بررسی ایدههای بنیادی سیستمهای پیچیده، تحقیقات پیشرفته در این زمینه و تأثیر بالقوه نظریهی پیچیدگی در حل مسائل دنیای واقعی میپردازد.
لینک زیر جلسات بحث در مورد این کتاب در دانشکدهی اقتصاد دانشگاه تهران است:
https://youtu.be/CRH1cHi8UWE?si=wrA88fbyS7bZCAs4
School of Particles and Accelerators
Wednesday Weekly Seminar – Hybrid Format
Date:
Wednesday, Sep 25, 2024 / چهارشنبه، 4 مهر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Farid Taghinavaz
Affiliation:
School of Particles and Accelerators, IPM
Title:
Study of linearized fluctuating hydrodynamics via random polynomials
Title in Persian:
مطالعه هیدرودینامیک اختلالی خطی شده به کمک توابع تصادفی
Abstract:
Recently, and due to some experimental observations, such as the collectivity in the collision of small hadrons like proton+proton or proton+lead, the use of Relativistic Hydrodynamics in its old form in modeling the collision of heavy ions has encountered some challenges. We will discuss these challenges and also address the new observations in the collision of small systems. We will then show how we can bring together the fluctuation and the analytical requirements to reproduce the real propagation modes. The role of the fluctuation is crucial and it turns out that with its help we can make the non-hydrodynamic modes in such systems vanish or fade out.
Based on: https://arxiv.org/abs/2408.01742
Indico Link: https://indico.hep.ipm.ir/e/f.taghinavaz1
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Wednesday Weekly Seminar – Hybrid Format
Date:
Wednesday, Sep 25, 2024 / چهارشنبه، 4 مهر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Farid Taghinavaz
Affiliation:
School of Particles and Accelerators, IPM
Title:
Study of linearized fluctuating hydrodynamics via random polynomials
Title in Persian:
مطالعه هیدرودینامیک اختلالی خطی شده به کمک توابع تصادفی
Abstract:
Recently, and due to some experimental observations, such as the collectivity in the collision of small hadrons like proton+proton or proton+lead, the use of Relativistic Hydrodynamics in its old form in modeling the collision of heavy ions has encountered some challenges. We will discuss these challenges and also address the new observations in the collision of small systems. We will then show how we can bring together the fluctuation and the analytical requirements to reproduce the real propagation modes. The role of the fluctuation is crucial and it turns out that with its help we can make the non-hydrodynamic modes in such systems vanish or fade out.
Based on: https://arxiv.org/abs/2408.01742
Indico Link: https://indico.hep.ipm.ir/e/f.taghinavaz1
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
arXiv.org
Linearized fluctuating hydrodynamics via random polynomials
We argue that an ensemble of backgrounds best understands hydrodynamic dispersion relations in a medium with few degrees of freedom and is therefore subject to strong thermal fluctuations. In the...
Forwarded from انجمن فیزیک ایران
✅ نشست دویست و هفدهم باشگاه فیزیک تهران
#اخبار_انجمن_فیزیک_ایران
نشست دویست و هفدهم باشگاه فیزیک تهران روز سهشنبه سوم همر ماه ۱۴۰۳ به صورت حضوری در سالن آمفی تئاتر دانشکده فیزیک دانشگاه تهران برگزار میشود. برنامه ساعت ۱۵:۳۰با اخبار فیزیک و مسابقه آغاز می شود. سخنران این نشست دکتر صالح رحیمی از دانشکده فیزیک دانشگاه تهران هستند و درباره « نقش تداخل کوانتومی در ...
📣 متن کامل را در Instant View ⚡️ (دکمه پایین صفحه) و یا در وبگاه انجمن فیزیک ایران بخوانید:
🚩http://www.psi.ir/news2_fa.asp?id=4116
⏪ وبگاه انجمن فیزیک ایران:
🌍 http://www.psi.ir
✅ به کانال خبرى انجمن فیزیک ايران بپيوندید:
👇👇🏽👇👇🏽👇👇🏽👇
http://t.me/psinews
#اخبار_انجمن_فیزیک_ایران
نشست دویست و هفدهم باشگاه فیزیک تهران روز سهشنبه سوم همر ماه ۱۴۰۳ به صورت حضوری در سالن آمفی تئاتر دانشکده فیزیک دانشگاه تهران برگزار میشود. برنامه ساعت ۱۵:۳۰با اخبار فیزیک و مسابقه آغاز می شود. سخنران این نشست دکتر صالح رحیمی از دانشکده فیزیک دانشگاه تهران هستند و درباره « نقش تداخل کوانتومی در ...
📣 متن کامل را در Instant View ⚡️ (دکمه پایین صفحه) و یا در وبگاه انجمن فیزیک ایران بخوانید:
🚩http://www.psi.ir/news2_fa.asp?id=4116
⏪ وبگاه انجمن فیزیک ایران:
🌍 http://www.psi.ir
✅ به کانال خبرى انجمن فیزیک ايران بپيوندید:
👇👇🏽👇👇🏽👇👇🏽👇
http://t.me/psinews
t.me
نشست دویست و هفدهم باشگاه فیزیک تهران
🇸🇪 PhD position in galactic Astrophysics 🇸🇪
We invite applications for a PhD position at the Division of Astronomy and Plasma Physics at Chalmers University of Technology. Join our dynamic research team to explore the role of magnetic fields and cosmic rays in shaping the interstellar medium of galaxies, and contribute to advancing our understanding of galactic astrophysics.
Project denoscription
You will work in the group of Asst. Prof. Gina Panopoulou. The group specializes in observational studies of interstellar magnetism as part of the division of Astronomy and Plasma Physics. The research project will involve the use of observations from radio telescopes probing magnetic fields and cosmic rays. The main aim will be to develop methods for inferring the properties of these galactic components from observations. The methods will be tested on existing magneto-hydro-dynamical simulations of galaxies.
Major responsibilities
conduct research (data analysis, software development, writing publications, studying literature, presenting at conferences),
complete courses in Astrophysics as well as transferable skills courses,
collaborate within international networks (e.g. SKA).
Research in the division covers a broad range of topics, including interstellar medium, star formation, galaxy evolution, evolved stars and exoplanets. PhD education at Chalmers offers a wide range of opportunities for career development, providing connections to astronomers in diverse fields, training in pedagogy, leadership, research ethics and an engaging and supportive work environment. As part of the PhD education, students conduct research and complete coursework covering advanced topics in Astrophysics.
For more information on the opening and how to apply, follow the link to the Chalmers job vacancies page:
https://www.chalmers.se/en/about-chalmers/work-with-us/vacancies/?rmpage=job&rmjob=13222&rmlang=UK
We invite applications for a PhD position at the Division of Astronomy and Plasma Physics at Chalmers University of Technology. Join our dynamic research team to explore the role of magnetic fields and cosmic rays in shaping the interstellar medium of galaxies, and contribute to advancing our understanding of galactic astrophysics.
Project denoscription
You will work in the group of Asst. Prof. Gina Panopoulou. The group specializes in observational studies of interstellar magnetism as part of the division of Astronomy and Plasma Physics. The research project will involve the use of observations from radio telescopes probing magnetic fields and cosmic rays. The main aim will be to develop methods for inferring the properties of these galactic components from observations. The methods will be tested on existing magneto-hydro-dynamical simulations of galaxies.
Major responsibilities
conduct research (data analysis, software development, writing publications, studying literature, presenting at conferences),
complete courses in Astrophysics as well as transferable skills courses,
collaborate within international networks (e.g. SKA).
Research in the division covers a broad range of topics, including interstellar medium, star formation, galaxy evolution, evolved stars and exoplanets. PhD education at Chalmers offers a wide range of opportunities for career development, providing connections to astronomers in diverse fields, training in pedagogy, leadership, research ethics and an engaging and supportive work environment. As part of the PhD education, students conduct research and complete coursework covering advanced topics in Astrophysics.
For more information on the opening and how to apply, follow the link to the Chalmers job vacancies page:
https://www.chalmers.se/en/about-chalmers/work-with-us/vacancies/?rmpage=job&rmjob=13222&rmlang=UK
www.chalmers.se
Vacancies
Forwarded from انجمن علمی ژرفا
circle-and-square.pdf
1.6 MB
🔰 «دایره یا مربع، کدام متقارنتر است؟»
در این مقاله برای پاسخ به سؤال مطرح شده که از میان دایره و مربع کدام یک متقارنتر است، ابتدا درباره تعریفی از تقارن صحبت میشود و گروه تقارنهای این اشکال بررسی میگردد. هدف از این بررسی آن است که فضای دارای گروه تقارن بزرگتر، متقارنتر محسوب شود. در ادامه گروه تقارنهای مکعب و کرۀ دوبعدی نیز مورد مقایسه قرار میگیرد. همچنین نویسنده به سوالاتی پیرامون نگاشتهای حافظ اندازه روی این اشیاء پرداخته است.
👤 دکتر آرش رستگار
📚 شماره ۶۹ نشریه فرهنگ و اندیشه ریاضی
🆔 @Zharfa90
در این مقاله برای پاسخ به سؤال مطرح شده که از میان دایره و مربع کدام یک متقارنتر است، ابتدا درباره تعریفی از تقارن صحبت میشود و گروه تقارنهای این اشکال بررسی میگردد. هدف از این بررسی آن است که فضای دارای گروه تقارن بزرگتر، متقارنتر محسوب شود. در ادامه گروه تقارنهای مکعب و کرۀ دوبعدی نیز مورد مقایسه قرار میگیرد. همچنین نویسنده به سوالاتی پیرامون نگاشتهای حافظ اندازه روی این اشیاء پرداخته است.
👤 دکتر آرش رستگار
📚 شماره ۶۹ نشریه فرهنگ و اندیشه ریاضی
🆔 @Zharfa90
🇩🇪 Postdoctoral Position in Machine Learning and Astrophysics/Cosmology 🇩🇪
We invite applications for a postdoctoral position in machine learning and astrophysics/cosmology at the Institute for Theoretical Physics (ITP) at Heidelberg University to work in the Machine Learning and observational cosmology research group led by Dr. Caroline Heneka.
The postdoctoral researcher will contribute to an active research program on the deveopment of state-of-the-art machine learning methods for astrophysics and cosmology. Particular applications concern large radio surveys, multi-line intensity mapping and the study of the Epoch of Reionisation. The postdoc will lead the development of ML models for generative, inference (SBI) and further typical downstream tasks. The applicant is expected to have up-to-date research experience in modern machine methods and deep learning architectures. A research background in large radio surveys, computational astrophysics, or computer science in general will also be considered favourably. The researcher will have the opportunity to supervise and mentor students.
Interested applicants should send a cover letter, CV, publication list, and a brief research statement (max. 3
pages) as a single pdf file to heneka@thphys.uni-heidelberg.de with subject 'Postdoc ML' and arrange for three letters of reference to be sent separately to the same email address. Applications submitted by October 30th will receive full consideration. Later applications will be considered until the position is filled.
We invite applications for a postdoctoral position in machine learning and astrophysics/cosmology at the Institute for Theoretical Physics (ITP) at Heidelberg University to work in the Machine Learning and observational cosmology research group led by Dr. Caroline Heneka.
The postdoctoral researcher will contribute to an active research program on the deveopment of state-of-the-art machine learning methods for astrophysics and cosmology. Particular applications concern large radio surveys, multi-line intensity mapping and the study of the Epoch of Reionisation. The postdoc will lead the development of ML models for generative, inference (SBI) and further typical downstream tasks. The applicant is expected to have up-to-date research experience in modern machine methods and deep learning architectures. A research background in large radio surveys, computational astrophysics, or computer science in general will also be considered favourably. The researcher will have the opportunity to supervise and mentor students.
Interested applicants should send a cover letter, CV, publication list, and a brief research statement (max. 3
pages) as a single pdf file to heneka@thphys.uni-heidelberg.de with subject 'Postdoc ML' and arrange for three letters of reference to be sent separately to the same email address. Applications submitted by October 30th will receive full consideration. Later applications will be considered until the position is filled.
Forwarded from String Theory & Holography (Mehdi Ameri)
Advanced Mathematical Methods For Physicists.pdf
168.2 MB
🔸 جزوه:
"روشهای پیشرفته ریاضی برای فیزیکدانان نظری"
شامل مباحثی مثل:
آشنایی با هندسه و فرمهای دیفرانسیلی
خواص فضاهای توپولوژیک
ابرتقارن
رویههای Calabi-Yau
و غیره
🔹براساس لکچرهای هیروچی اوگوری
.
@sth_fum
"روشهای پیشرفته ریاضی برای فیزیکدانان نظری"
شامل مباحثی مثل:
آشنایی با هندسه و فرمهای دیفرانسیلی
خواص فضاهای توپولوژیک
ابرتقارن
رویههای Calabi-Yau
و غیره
🔹براساس لکچرهای هیروچی اوگوری
.
@sth_fum
Forwarded from انجمن فیزیک ایران
✅ جتهای سیاهچالهای آنقدر عظیم هستند که ممکن است علم کیهانشناسی را دگرگون کنند
#اخبار_علمی_و_پژوهشی
بزرگترین جتهای سیاهچالهای که تاکنون مشاهده شدهاند، نشان میدهند که این هیولاهای کیهانی ممکن است نقشی حتی مهمتر از آنچه که قبلاً تصور میشد در شکلگیری کهکشانها ایفا کنند. ستارهشناسان، بزرگترین جفت جتهای سیاهچالهای که تاکنون رصد شدهاند را کشف کردهاند. این جتها با طول ۲۳ میلیون سال ...
📣 متن کامل را در Instant View ⚡️ (دکمه پایین صفحه) و یا در وبگاه انجمن فیزیک ایران بخوانید:
🚩http://www.psi.ir/news2_fa.asp?id=4117
⏪ وبگاه انجمن فیزیک ایران:
🌍 http://www.psi.ir
✅ به کانال خبرى انجمن فیزیک ايران بپيوندید:
👇👇🏽👇👇🏽👇👇🏽👇
http://t.me/psinews
#اخبار_علمی_و_پژوهشی
بزرگترین جتهای سیاهچالهای که تاکنون مشاهده شدهاند، نشان میدهند که این هیولاهای کیهانی ممکن است نقشی حتی مهمتر از آنچه که قبلاً تصور میشد در شکلگیری کهکشانها ایفا کنند. ستارهشناسان، بزرگترین جفت جتهای سیاهچالهای که تاکنون رصد شدهاند را کشف کردهاند. این جتها با طول ۲۳ میلیون سال ...
📣 متن کامل را در Instant View ⚡️ (دکمه پایین صفحه) و یا در وبگاه انجمن فیزیک ایران بخوانید:
🚩http://www.psi.ir/news2_fa.asp?id=4117
⏪ وبگاه انجمن فیزیک ایران:
🌍 http://www.psi.ir
✅ به کانال خبرى انجمن فیزیک ايران بپيوندید:
👇👇🏽👇👇🏽👇👇🏽👇
http://t.me/psinews
t.me
جتهای سیاهچالهای آنقدر عظیم هستند که ممکن است علم کیهانشناسی را دگرگون کنند
🇮🇹 Postdoc position in Statistical Field Theory in Florence 🇮🇹
We are going to have a 2-year INFN postdoc position in Florence. The deadline for application is November 15. The starting date is in the fall 2025 or earlier. The position is open to non-Italian applicants and Italians which have been abroad for 3 consecutive years at the time of the deadline. See attached announcement, the position is called, `Statistical Field Theory' the name of the italian INFN network we are in. The research activities in our group are: - topological phases of matter, conformal bootstrap (Andrea Cappelli) - integrable systems, matrix models (Filippo Colomo) - quantum information, quantum computation (Leonardo Banchi, Paola Verrucchi) See also: https://web.infn.it/CSN4/index.php/it/17-esperimenti/124-sft-news Please circulate among possible candidates.
We are going to have a 2-year INFN postdoc position in Florence. The deadline for application is November 15. The starting date is in the fall 2025 or earlier. The position is open to non-Italian applicants and Italians which have been abroad for 3 consecutive years at the time of the deadline. See attached announcement, the position is called, `Statistical Field Theory' the name of the italian INFN network we are in. The research activities in our group are: - topological phases of matter, conformal bootstrap (Andrea Cappelli) - integrable systems, matrix models (Filippo Colomo) - quantum information, quantum computation (Leonardo Banchi, Paola Verrucchi) See also: https://web.infn.it/CSN4/index.php/it/17-esperimenti/124-sft-news Please circulate among possible candidates.
web.infn.it
SFT News
sito della CSN4, INFN fisica teorica,
Random Matrix Gravity and Double Hierarchy Problem
Nima Khosravi
Department of Physics, Sharif University of Technology,
Department of Physics, Shahid Beheshti University
Abstract:
Why are the cosmological constant, electroweak and Planck scales so different? This ``double hierarchy" problem, where Λ≪M^2_EW≪M^2_p, is one of the most pressing in fundamental physics. We show that in a theory of N randomly coupled massive gravitons at the electroweak scale, these scales are linked precisely by such a double hierarchy for large N, with intriguing cosmological consequences. Surprisingly, in all the physical scales, only one massless graviton emerges which is also, effectively, the only one that is coupled to matter, giving rise to standard Einstein gravity, with M^2_pGμν=Tμν at large N. In addition, there is a tower of massive gravitons, the lightest of which can drive late-time acceleration. In this scenario, the observed empirical relation ΛMp^2∼M_EW^4 as well as the double hierarchy, arise naturally since since Λ ∼ M_EW^2/√(N) and Mp^2 ∼ √(N)M_EW^2.
یکشنبه 8 مهر 1403، ساعت 17:00
Sunday 29 September 2024 – 17:00 Tehran Time
Hybrid Seminar
دانشکده فیزیک – طبقه اول – کلاس فیزیک 3 Physics Department – first floor – Room Physics 3 /
https://vc.sharif.edu/ch/cosmology
Nima Khosravi
Department of Physics, Sharif University of Technology,
Department of Physics, Shahid Beheshti University
Abstract:
Why are the cosmological constant, electroweak and Planck scales so different? This ``double hierarchy" problem, where Λ≪M^2_EW≪M^2_p, is one of the most pressing in fundamental physics. We show that in a theory of N randomly coupled massive gravitons at the electroweak scale, these scales are linked precisely by such a double hierarchy for large N, with intriguing cosmological consequences. Surprisingly, in all the physical scales, only one massless graviton emerges which is also, effectively, the only one that is coupled to matter, giving rise to standard Einstein gravity, with M^2_pGμν=Tμν at large N. In addition, there is a tower of massive gravitons, the lightest of which can drive late-time acceleration. In this scenario, the observed empirical relation ΛMp^2∼M_EW^4 as well as the double hierarchy, arise naturally since since Λ ∼ M_EW^2/√(N) and Mp^2 ∼ √(N)M_EW^2.
یکشنبه 8 مهر 1403، ساعت 17:00
Sunday 29 September 2024 – 17:00 Tehran Time
Hybrid Seminar
دانشکده فیزیک – طبقه اول – کلاس فیزیک 3 Physics Department – first floor – Room Physics 3 /
https://vc.sharif.edu/ch/cosmology
🇩🇪 Postdoctoral position on Cosmology and Artificial Intelligence 🇩🇪
We seek to appoint a three-year postdoctoral researcher to conduct original research in the areas of cosmology and artificial intelligence, with focus on large-scale structure. The successful applicant will be part of the newly formed research group led by Professor Luisa Lucie-Smith at the University of Hamburg, Germany. The successful applicant will conduct original research to advance machine learning approaches in cosmological research, broadly related to topics such as modelling of the large-scale structure, the galaxy-halo connection and testing open questions in fundamental physics.
Candidates with existing expertise in computational modelling, numerical simulations, developing and applying novel statistical and machine learning techniques will be highly valued; an understanding or experience in the area of explainable artificial intelligence will also be advantageous. German language skills are not required.
The University values and actively supports equality, diversity and inclusion and strongly welcomes applications from women and underrepresented minorities.
The successful applicant will be based on the Hamburg Observatory campus situated south of the city of Hamburg. Scientists at Hamburg Observatory cover a wide range of research areas of modern astrophysics, such as extragalactic astronomy, cosmology, galaxy formation, gravitational waves and statistical analysis including artificial intelligence. Our 9 individual research groups provide a diverse and stimulating research environment. Furthermore, the successful candidate will be able to benefit from the Observatory's close ties with other research institutes in Hamburg, including DESY and the Cluster of Excellence "Quantum Universe". Generous computing resources as well as travel funding will be available to the successful candidate.
The term of employment is for three years, with an anticipated starting date in 2025.
Interested candidates are invited to apply via email to luisals@mpa-garching.mpg.de. Candidates should send (1) a curriculum vitae, including names and email addresses of two or three references; (2) publication list; (3) cover letter; and (4) a research statement (3xA4 pages max, 11pt font) by December 1, 2024. Also arrange for at least two letters of recommendation to be submitted via email by December 1, 2024. Late applications will be accepted until the post is filled.
Publication Start Date
2024 Sep 25
Application Deadline
2024 Dec 01
We seek to appoint a three-year postdoctoral researcher to conduct original research in the areas of cosmology and artificial intelligence, with focus on large-scale structure. The successful applicant will be part of the newly formed research group led by Professor Luisa Lucie-Smith at the University of Hamburg, Germany. The successful applicant will conduct original research to advance machine learning approaches in cosmological research, broadly related to topics such as modelling of the large-scale structure, the galaxy-halo connection and testing open questions in fundamental physics.
Candidates with existing expertise in computational modelling, numerical simulations, developing and applying novel statistical and machine learning techniques will be highly valued; an understanding or experience in the area of explainable artificial intelligence will also be advantageous. German language skills are not required.
The University values and actively supports equality, diversity and inclusion and strongly welcomes applications from women and underrepresented minorities.
The successful applicant will be based on the Hamburg Observatory campus situated south of the city of Hamburg. Scientists at Hamburg Observatory cover a wide range of research areas of modern astrophysics, such as extragalactic astronomy, cosmology, galaxy formation, gravitational waves and statistical analysis including artificial intelligence. Our 9 individual research groups provide a diverse and stimulating research environment. Furthermore, the successful candidate will be able to benefit from the Observatory's close ties with other research institutes in Hamburg, including DESY and the Cluster of Excellence "Quantum Universe". Generous computing resources as well as travel funding will be available to the successful candidate.
The term of employment is for three years, with an anticipated starting date in 2025.
Interested candidates are invited to apply via email to luisals@mpa-garching.mpg.de. Candidates should send (1) a curriculum vitae, including names and email addresses of two or three references; (2) publication list; (3) cover letter; and (4) a research statement (3xA4 pages max, 11pt font) by December 1, 2024. Also arrange for at least two letters of recommendation to be submitted via email by December 1, 2024. Late applications will be accepted until the post is filled.
Publication Start Date
2024 Sep 25
Application Deadline
2024 Dec 01
School of Particles and Accelerators
Journal Club: Experiments & Phenomenology / Hybrid Format
Date:
Monday, Sep 30, 2024 / دوشنبه، 9 مهر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Motahareh Kiamari
Affiliation:
School of Particles and Accelerators, IPM
Title:
Chiral symmetry breaking and monopoles in gauge theories
Title in Persian:
شکست تقارن کایرال و تک قطبی ها در نظریه های پیمانه ای
Abstract:
QCD monopoles are magnetically charged quasiparticles whose Bose-Einstein condensation (BEC) at T<Tc creates electric confinement and flux tubes. The “magnetic scenario” of QCD proposes that scattering on the non-condensed component of the monopole ensemble at T>Tc plays an important role in explaining the properties of strongly coupled quark-gluon plasma (sQGP) near the deconfinement temperature. In this paper, we study the phenomenon of chiral symmetry breaking and its relation to magnetic monopoles. Specifically, we study the eigenvalue spectrum of the Dirac operator in the basis of fermionic zero modes in an SU(2) monopole background. We find that as the temperature approaches the deconfinement temperature ω=0 from above, the eigenvalue spectrum has a finite density at ω=0, indicating the presence of a chiral condensate. In addition, we find the critical scaling of the eigenvalue gap to be consistent with that of the correlation length in the 3d Ising model and the BEC transition of monopoles on the lattice.
Based on: https://arxiv.org/abs/1801.06922
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://www.skyroom.online/ch/ipm-particles/journal-club
Journal Club: Experiments & Phenomenology / Hybrid Format
Date:
Monday, Sep 30, 2024 / دوشنبه، 9 مهر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Motahareh Kiamari
Affiliation:
School of Particles and Accelerators, IPM
Title:
Chiral symmetry breaking and monopoles in gauge theories
Title in Persian:
شکست تقارن کایرال و تک قطبی ها در نظریه های پیمانه ای
Abstract:
QCD monopoles are magnetically charged quasiparticles whose Bose-Einstein condensation (BEC) at T<Tc creates electric confinement and flux tubes. The “magnetic scenario” of QCD proposes that scattering on the non-condensed component of the monopole ensemble at T>Tc plays an important role in explaining the properties of strongly coupled quark-gluon plasma (sQGP) near the deconfinement temperature. In this paper, we study the phenomenon of chiral symmetry breaking and its relation to magnetic monopoles. Specifically, we study the eigenvalue spectrum of the Dirac operator in the basis of fermionic zero modes in an SU(2) monopole background. We find that as the temperature approaches the deconfinement temperature ω=0 from above, the eigenvalue spectrum has a finite density at ω=0, indicating the presence of a chiral condensate. In addition, we find the critical scaling of the eigenvalue gap to be consistent with that of the correlation length in the 3d Ising model and the BEC transition of monopoles on the lattice.
Based on: https://arxiv.org/abs/1801.06922
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://www.skyroom.online/ch/ipm-particles/journal-club
arXiv.org
Chiral symmetry breaking and monopoles in gauge theories
QCD monopoles are magnetically charged quasiparticles whose Bose-Einstein condensation (BEC) at $T<T_c$ creates electric confinement and flux tubes. The "magnetic scenario" of QCD proposes that...
Forwarded from یادگیری ماشین - دانشگاه شریف - پاییز ۱۴۰۳
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❇️ CERN Theory Department postdoctoral positions ❇️
The CERN Theory Department will have openings for postdoctoral positions (Research Fellowships) in all areas of relevance to particle physics, including QCD, collider physics, Standard Model and beyond, astroparticle physics and cosmology, heavy-ion physics, lattice gauge theory, quantum field theory, quantum gravity and string theory, mathematical physics. Please help us to distribute the information to potential candidates.
Diversity has been an integral part of CERN’s mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to its success. Applications from minorities and under-represented groups are strongly encouraged.
The positions are open to candidates both from CERN’s member states and non-member state. For more information click here.
Please note the early deadlines for applications (October 15th, 2024)
- Nationals from member states can apply here.
- Nationals from other countries can apply here.
- Candidates of South Korean nationality are encouraged to apply also for the CKC fellowship. For more information, contact the Korean Physical Society (office@kps.or.kr).
The CERN Theory Department will have openings for postdoctoral positions (Research Fellowships) in all areas of relevance to particle physics, including QCD, collider physics, Standard Model and beyond, astroparticle physics and cosmology, heavy-ion physics, lattice gauge theory, quantum field theory, quantum gravity and string theory, mathematical physics. Please help us to distribute the information to potential candidates.
Diversity has been an integral part of CERN’s mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to its success. Applications from minorities and under-represented groups are strongly encouraged.
The positions are open to candidates both from CERN’s member states and non-member state. For more information click here.
Please note the early deadlines for applications (October 15th, 2024)
- Nationals from member states can apply here.
- Nationals from other countries can apply here.
- Candidates of South Korean nationality are encouraged to apply also for the CKC fellowship. For more information, contact the Korean Physical Society (office@kps.or.kr).
School of Particles and Accelerators
Special Seminar / Hybrid Format
Date:
Wednesday, Oct 2, 2024 / چهارشنبه، 11 مهر 1403
Time:
11:00 AM (Tehran time)
Speaker:
Prof. Andrei Kataev
Affiliation:
The Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow
Title:
Fine structure of the massless perturbation theory series in QCD and the generalizations of the Crewther relation
Title in Persian:
ساختار ریز سریهای نظریه اغتشاشی بیجرم در کرومودینامیک کوانتومی و تعمیم های رابطه کروتر
Abstract:
The structure of the beta-expanded representations for the coefficients of the perturbative QCD series for the e^+e^-- annihilation Adler function and Bjorken polarized and Gross-Llewellyn Smith neutrino DIS sum rule is analysed. The product of the series for the Adler function and these Deep-inelastic scattering sum rules obeys the generalized Crewther relation, which reflects the manifestation pf the proportional to the RG Beta-function conformal symmetry breaking perturbative contribution into the amplitide of pi- gamma gamma decay / The relation of the beta-expanded represntations for these series to proper treatment of the renormalon free PT QCD variants pf the Brodsky-Lepage-Mackenzie scale fixing procedure is discussed. The relation to the perturbative quenced QCD and finite QED limits expressions, which are realized in the non-distingushed in the experimentally related conformal symmetry limit considerations is clarified.
Meeting Place:
Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually:
https://www.skyroom.online/ch/ipm-particles/seminar
Special Seminar / Hybrid Format
Date:
Wednesday, Oct 2, 2024 / چهارشنبه، 11 مهر 1403
Time:
11:00 AM (Tehran time)
Speaker:
Prof. Andrei Kataev
Affiliation:
The Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow
Title:
Fine structure of the massless perturbation theory series in QCD and the generalizations of the Crewther relation
Title in Persian:
ساختار ریز سریهای نظریه اغتشاشی بیجرم در کرومودینامیک کوانتومی و تعمیم های رابطه کروتر
Abstract:
The structure of the beta-expanded representations for the coefficients of the perturbative QCD series for the e^+e^-- annihilation Adler function and Bjorken polarized and Gross-Llewellyn Smith neutrino DIS sum rule is analysed. The product of the series for the Adler function and these Deep-inelastic scattering sum rules obeys the generalized Crewther relation, which reflects the manifestation pf the proportional to the RG Beta-function conformal symmetry breaking perturbative contribution into the amplitide of pi- gamma gamma decay / The relation of the beta-expanded represntations for these series to proper treatment of the renormalon free PT QCD variants pf the Brodsky-Lepage-Mackenzie scale fixing procedure is discussed. The relation to the perturbative quenced QCD and finite QED limits expressions, which are realized in the non-distingushed in the experimentally related conformal symmetry limit considerations is clarified.
Meeting Place:
Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually:
https://www.skyroom.online/ch/ipm-particles/seminar
🇳🇱 PhD positions at the University of Amsterdam 🇳🇱
The Anton Pannekoek Institute for Astronomy (API) at the University of Amsterdam invites applicants for PhD positions in astronomy and astrophysics. The positions are open to candidates from any country. The institute provides a stimulating, international environment in a city where English is a common language. Of our current PhD candidates, over 70% are foreign and over 40% are female. You execute a vigorous research program, under the supervision of one or more faculty members. Positions will be available in fields of research where the institute is active, including planet formation and exoplanets, stellar astrophysics, astrophysics of neutron stars and black holes, and the detection and characterization of radio counterparts of gravitational wave sources.
Link to Online Application
https://vacatures.uva.nl/UvA/job/PhD-Positions-in-Astronomy-and-Astrophysics/804105602/
Publication Start Date
2024 Oct 01
Application Deadline
2024 Nov 04
The Anton Pannekoek Institute for Astronomy (API) at the University of Amsterdam invites applicants for PhD positions in astronomy and astrophysics. The positions are open to candidates from any country. The institute provides a stimulating, international environment in a city where English is a common language. Of our current PhD candidates, over 70% are foreign and over 40% are female. You execute a vigorous research program, under the supervision of one or more faculty members. Positions will be available in fields of research where the institute is active, including planet formation and exoplanets, stellar astrophysics, astrophysics of neutron stars and black holes, and the detection and characterization of radio counterparts of gravitational wave sources.
Link to Online Application
https://vacatures.uva.nl/UvA/job/PhD-Positions-in-Astronomy-and-Astrophysics/804105602/
Publication Start Date
2024 Oct 01
Application Deadline
2024 Nov 04
Forwarded from دانشگاه صنعتی شریف
#فراخوان *جذب پژوهشگر پسادکتری*
🔹 امکان فرصت مطالعاتی پسادکتری، در پژوهشکده علوم و فناوریهای انرژی، آب و محیط زیست شریف در زمینههای کاربردی زیر مهیا شدهاست:
• پژوهش و ارزیابی پتانسیلهای بازار بهینهسازی مصرف انرژی و محیط زیست در بخشهای کلیدی مصرف انرژی در ایران
• طراحی مدل مالی برای اجرای طرحهای بهینهسازی مصرف انرژی با مشارکت مردم از طریق صندوقهای سرمایهگذاری
• ارزیابی اقتصادی طرحهای صرفهجویی در طرف تقاضا و تحلیل کشش قیمتی تقاضا برای صنایع مصرفکننده
• تدوین استراتژی و نقشه راه برای راهاندازی صندوقهای سرمایهگذاری در بازار انرژی ایران
🔹رشتههای مرتبط:
• مهندسی انرژی
• مهندسی برق گرایش قدرت
• مدیریت و اقتصاد انرژی
📍 علاقهمندان میتوانند تا تاریخ ۳۰ مهر ۱۴۰۳ نسبت به ارسال درخواست خود به رایانشانی m.sharifzadeh@sharif.edu اقدام کنند.
🆔️@sharif_prm
🔹 امکان فرصت مطالعاتی پسادکتری، در پژوهشکده علوم و فناوریهای انرژی، آب و محیط زیست شریف در زمینههای کاربردی زیر مهیا شدهاست:
• پژوهش و ارزیابی پتانسیلهای بازار بهینهسازی مصرف انرژی و محیط زیست در بخشهای کلیدی مصرف انرژی در ایران
• طراحی مدل مالی برای اجرای طرحهای بهینهسازی مصرف انرژی با مشارکت مردم از طریق صندوقهای سرمایهگذاری
• ارزیابی اقتصادی طرحهای صرفهجویی در طرف تقاضا و تحلیل کشش قیمتی تقاضا برای صنایع مصرفکننده
• تدوین استراتژی و نقشه راه برای راهاندازی صندوقهای سرمایهگذاری در بازار انرژی ایران
🔹رشتههای مرتبط:
• مهندسی انرژی
• مهندسی برق گرایش قدرت
• مدیریت و اقتصاد انرژی
📍 علاقهمندان میتوانند تا تاریخ ۳۰ مهر ۱۴۰۳ نسبت به ارسال درخواست خود به رایانشانی m.sharifzadeh@sharif.edu اقدام کنند.
🆔️@sharif_prm
🇪🇸 Postdoctoral position in extragalactic radio astronomy 🇪🇸
We invite applications for a postdoctoral position of two years duration at Universidad Complutense de Madrid (Spain) to work with Dr. Shane P. O'Sullivan on extragalactic radio surveys related to cosmic magnetism science.
The postdoctoral researcher will work with data from ongoing radio polarization surveys, such as the LOFAR Two-Metre Sky Survey and the ASKAP-POSSUM survey, to constrain the properties of cosmic magnetic fields across a wide range of physical scales and use the results to test models for their origin. They will also be involved in the preparation for future projects with the Square Kilometre Array (SKA) telescope, which Spain is a full member of.
The successful candidate will become part of the Extragalactic Astrophysics and Astronomical Instrumentation group of UCM (GUAIX), as well as the Institute of Particle Physics and the Cosmos (IPARCOS). See https://guaix.ucm.es/home/science/cosmic-magnetic-fields for more details.
Applicants should have a PhD in Astrophysics and experience in radio astronomy.
Applications are especially encouraged from people from underrepresented groups.
Interested candidates should email their CV (including the names of two referees), a motivation letter (max. 1 page) and a summary of research accomplishments to date (max. 1 page) to s.p.osullivan@ucm.es by 25 November 2024. The earliest start date will be mid-Feb 2025.
Publication Start Date
2024 Oct 02
Application Deadline
2024 Nov 25
We invite applications for a postdoctoral position of two years duration at Universidad Complutense de Madrid (Spain) to work with Dr. Shane P. O'Sullivan on extragalactic radio surveys related to cosmic magnetism science.
The postdoctoral researcher will work with data from ongoing radio polarization surveys, such as the LOFAR Two-Metre Sky Survey and the ASKAP-POSSUM survey, to constrain the properties of cosmic magnetic fields across a wide range of physical scales and use the results to test models for their origin. They will also be involved in the preparation for future projects with the Square Kilometre Array (SKA) telescope, which Spain is a full member of.
The successful candidate will become part of the Extragalactic Astrophysics and Astronomical Instrumentation group of UCM (GUAIX), as well as the Institute of Particle Physics and the Cosmos (IPARCOS). See https://guaix.ucm.es/home/science/cosmic-magnetic-fields for more details.
Applicants should have a PhD in Astrophysics and experience in radio astronomy.
Applications are especially encouraged from people from underrepresented groups.
Interested candidates should email their CV (including the names of two referees), a motivation letter (max. 1 page) and a summary of research accomplishments to date (max. 1 page) to s.p.osullivan@ucm.es by 25 November 2024. The earliest start date will be mid-Feb 2025.
Publication Start Date
2024 Oct 02
Application Deadline
2024 Nov 25
Imprint of Massive Neutrinos on Persistent Homology (Morphology) of Large-Scale Structure
Mohammad Hossein Jalali Kanafi
Department of Physics, Shahid Beheshti University
Abstract:
The morphology of the cosmos provides valuable information about the structure of the cosmic web, which can be used for cosmological inferences. In this talk, I will discuss the capability of Persistent Homology (PH) as a morphological tool to investigate the impact of massive neutrinos on the Large-Scale Structure (LSS). PH naturally addresses the multi-scale topological characteristics of the LSS as a distribution of clusters, loops, and voids. Utilizing the Fisher forecast formalism, I will provide a quantitative assessment about the constraining power of some PH vectorizations to estimate the parameters of the $\nu \Lambda CDM$ model.
یکشنبه 15 مهر 1403، ساعت 17:00
Sunday 6 October 2024 – 17:00 Tehran Time
Hybrid Seminar
دانشکده فیزیک – طبقه اول – کلاس فیزیک 3 Physics Department – first floor – Room Physics 3 /
https://vc.sharif.edu/ch/cosmology
Mohammad Hossein Jalali Kanafi
Department of Physics, Shahid Beheshti University
Abstract:
The morphology of the cosmos provides valuable information about the structure of the cosmic web, which can be used for cosmological inferences. In this talk, I will discuss the capability of Persistent Homology (PH) as a morphological tool to investigate the impact of massive neutrinos on the Large-Scale Structure (LSS). PH naturally addresses the multi-scale topological characteristics of the LSS as a distribution of clusters, loops, and voids. Utilizing the Fisher forecast formalism, I will provide a quantitative assessment about the constraining power of some PH vectorizations to estimate the parameters of the $\nu \Lambda CDM$ model.
یکشنبه 15 مهر 1403، ساعت 17:00
Sunday 6 October 2024 – 17:00 Tehran Time
Hybrid Seminar
دانشکده فیزیک – طبقه اول – کلاس فیزیک 3 Physics Department – first floor – Room Physics 3 /
https://vc.sharif.edu/ch/cosmology