Institute for Research in Fundamental Sciences (IPM) SoA Weakly Seminar
The new DESI cosmology results:
What we have (not) learned about dark energy
نتایج جدید کیهانشناسی DESI: آموختهها و نیاموختههایمان در مورد انرژی تاریک
Yashar Akrami
Instituto de Física Teórica (IFT) UAM-CSIC, Spain;
Case Western Reserve University, USA
Abstract:
The new Dark Energy Spectroscopic Instrument (DESI) DR2 results have strengthened the possibility that dark energy is dynamical, i.e., it has evolved over the history of the Universe. This has raised the excitement that the first release of the DESI results generated in both cosmology and high-energy physics communities, and if taken at face value, it is the first time that the standard ΛCDM model of cosmology has faced a serious observational challenge. In this talk, I will first provide an overview of dynamical dark energy and why we may need it, and will then delve into the DESI findings, explaining what we have learned about the nature of dark energy and what we have not. I will particularly emphasize a few caveats which should be considered when interpreting the DESI results.
سهشنبه 09 ﻣﺎه اردیبهشت 1404 ﺳﺎﻋﺖ 11:00
Tuesday, April 29th, 2025 – 11:00 Tehran Time
Please note the time and the day of the seminar
Venue: SoA’s Seminar Room (in person)
The new DESI cosmology results:
What we have (not) learned about dark energy
نتایج جدید کیهانشناسی DESI: آموختهها و نیاموختههایمان در مورد انرژی تاریک
Yashar Akrami
Instituto de Física Teórica (IFT) UAM-CSIC, Spain;
Case Western Reserve University, USA
Abstract:
The new Dark Energy Spectroscopic Instrument (DESI) DR2 results have strengthened the possibility that dark energy is dynamical, i.e., it has evolved over the history of the Universe. This has raised the excitement that the first release of the DESI results generated in both cosmology and high-energy physics communities, and if taken at face value, it is the first time that the standard ΛCDM model of cosmology has faced a serious observational challenge. In this talk, I will first provide an overview of dynamical dark energy and why we may need it, and will then delve into the DESI findings, explaining what we have learned about the nature of dark energy and what we have not. I will particularly emphasize a few caveats which should be considered when interpreting the DESI results.
سهشنبه 09 ﻣﺎه اردیبهشت 1404 ﺳﺎﻋﺖ 11:00
Tuesday, April 29th, 2025 – 11:00 Tehran Time
Please note the time and the day of the seminar
Venue: SoA’s Seminar Room (in person)
Forwarded from مرکز پژوهشی فیزیک انرژی بالا
دوره کوتاه
بازبهنجارش: از اختلالات تکین تا میدانهای کوانتومی ابرمتقارن
از دوشنبه، ۱۵ اردیبهشت،
در مرکز پژوهشی فیزیک انرژی بالا
برای اطلاعات تکمیلی به این پیام مراجعه کنید.
@SharifHEPCenter
بازبهنجارش: از اختلالات تکین تا میدانهای کوانتومی ابرمتقارن
هدف این دوره دانشجویان علاقمند به نظریه میدان میباشند.
پیشنیاز جلسه اول معادلات دیفرانسیل، و پیشنیاز جلسات بعدی گذراندن حداقل یکی از دروس آشنایی با نظریه میدان، نظریه میدان آماری، یا پدیدههای بحرانی است
از دوشنبه، ۱۵ اردیبهشت،
در مرکز پژوهشی فیزیک انرژی بالا
برای اطلاعات تکمیلی به این پیام مراجعه کنید.
@SharifHEPCenter
Forwarded from انجمن علمی ژرفا
🔸 "Particle Physics: A Window to Very Small Dimensions"
👤 Prof. Saeed Paktinat
🏛 Department of Physics, Yazd University, Iran
📆 Tuesday, May 6, 2025
⏰ 08:00 PM (Tehran Time, UTC +3:30)
🌐 vc.sharif.edu/zharfa
🔸 «فیزیک ذرات: پنجرهای به ابعاد بسیار کوچک»
👤 دکتر سعید پاکطینت، از دانشگاه یزد
📆 سهشنبه ۱۶ اردیبهشت ۱۴۰۴ | ساعت ۲۰
🌐 به صورت مجازی در اتاق مجازی ژرفا
💬 زبان ارائه انگلیسی است.
در این ارائه، خواهیم دید که چگونه آزمایشها و مشاهدات جدید، ماهیت مواد را در مقیاسهای بسیار ریز شناسایی میکنند؛ از کوارکها تا میدانهای کوانتومی.
این رویداد به میزبانی انجمن علمی نانو دانشگاه یزد و با همکاری انجمن علمی ژرفا برگزار میشود.
🆔 @Nano_YazdUni
🆔 @Zharfa90
👤 Prof. Saeed Paktinat
🏛 Department of Physics, Yazd University, Iran
📆 Tuesday, May 6, 2025
⏰ 08:00 PM (Tehran Time, UTC +3:30)
🌐 vc.sharif.edu/zharfa
🔸 «فیزیک ذرات: پنجرهای به ابعاد بسیار کوچک»
👤 دکتر سعید پاکطینت، از دانشگاه یزد
📆 سهشنبه ۱۶ اردیبهشت ۱۴۰۴ | ساعت ۲۰
🌐 به صورت مجازی در اتاق مجازی ژرفا
💬 زبان ارائه انگلیسی است.
در این ارائه، خواهیم دید که چگونه آزمایشها و مشاهدات جدید، ماهیت مواد را در مقیاسهای بسیار ریز شناسایی میکنند؛ از کوارکها تا میدانهای کوانتومی.
این رویداد به میزبانی انجمن علمی نانو دانشگاه یزد و با همکاری انجمن علمی ژرفا برگزار میشود.
🆔 @Nano_YazdUni
🆔 @Zharfa90
School of Particles and Accelerators
Journal Club: Experiments & Phenomenology / Hybrid Format
Date:
Monday, 5 May 2025/ دوشنبه، 15 اردیبهشت 1404
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Meisam Ghasemi
Affiliation:
School of Particles and Accelerators, IPM
Title:
Applications of Classical and Quantum Neural Networks in HEP Analyses
Title in Persian:
کاربردهای شبکه عصبی کلاسیک و کوانتومی در تحلیل های فیزیک انرژی بالا
Abstract:
This presentation explores the application of classical and quantum machine learning techniques in particle physics, highlighting their role in tasks such as jet classification, Higgs boson and SUSY identification, and fully hadronic event generation. It begins with an overview of the historical development of artificial intelligence and foundational concepts in deep learning, followed by practical implementations of deep neural networks (DNNs) and convolutional neural networks (CNNs) in high-energy physics analyses, including supersymmetry searches and jet substructure studies. The presentation then introduces quantum machine learning (QML), covering models such as quantum support vector machines (QSVMs) and variational quantum classifiers (VQCs), along with their advantages and challenges in Higgs boson identification. Finally, the use of generative AI is presented as a solution for data generation in both Standard Model and beyond Standard Model scenarios, enabling the production of synthetic datasets significantly faster than traditional Monte Carlo simulations involving MadGraph, Pythia, and Geant4.
Based on: https://link.springer.com/article/10.1140/epjc/s10052-023-11543-6 ,
https://cs231n.stanford.edu/reports/2016/pdfs/300_Report.pdf ,
https://arxiv.org/abs/2104.07692,
https://arxiv.org/abs/1701.05927
Indico Link: https://indico.hep.ipm.ir/e/m.ghasemi
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, 5 May 2025/ دوشنبه، 15 اردیبهشت 1404
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Meisam Ghasemi
Affiliation:
School of Particles and Accelerators, IPM
Title:
Applications of Classical and Quantum Neural Networks in HEP Analyses
Title in Persian:
کاربردهای شبکه عصبی کلاسیک و کوانتومی در تحلیل های فیزیک انرژی بالا
Abstract:
This presentation explores the application of classical and quantum machine learning techniques in particle physics, highlighting their role in tasks such as jet classification, Higgs boson and SUSY identification, and fully hadronic event generation. It begins with an overview of the historical development of artificial intelligence and foundational concepts in deep learning, followed by practical implementations of deep neural networks (DNNs) and convolutional neural networks (CNNs) in high-energy physics analyses, including supersymmetry searches and jet substructure studies. The presentation then introduces quantum machine learning (QML), covering models such as quantum support vector machines (QSVMs) and variational quantum classifiers (VQCs), along with their advantages and challenges in Higgs boson identification. Finally, the use of generative AI is presented as a solution for data generation in both Standard Model and beyond Standard Model scenarios, enabling the production of synthetic datasets significantly faster than traditional Monte Carlo simulations involving MadGraph, Pythia, and Geant4.
Based on: https://link.springer.com/article/10.1140/epjc/s10052-023-11543-6 ,
https://cs231n.stanford.edu/reports/2016/pdfs/300_Report.pdf ,
https://arxiv.org/abs/2104.07692,
https://arxiv.org/abs/1701.05927
Indico Link: https://indico.hep.ipm.ir/e/m.ghasemi
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://www.skyroom.online/ch/ipm-particles/journal-club
Physics Colloquium
Speaker
Robert Brandenberger
Affiliation
McGill University
Title of talk
Do we understand early Universe cosmology?
عنوان: آیا کیهانشناحت جهان اولیه را میفهمیم؟
Date and time,
6-7:30pm, Wednesday 21 May 2025 (31 Ordibehesht 1404)
Venue: Online
Link
https://www.skyroom.online/ch/schoolofphysics/colloquium
Abstract
I will argue that the usual effective field theory techniques break down in the rapdily expanding background of the early universe. The TCC ("Trans-Planckian Censorship Criterion") plays a key role in the argument. I will then discuss an attempt to obtain an emerging metric space-time and early universe cosmology starting from a quantum mechanical matrix model.
Speaker
Robert Brandenberger
Affiliation
McGill University
Title of talk
Do we understand early Universe cosmology?
عنوان: آیا کیهانشناحت جهان اولیه را میفهمیم؟
Date and time,
6-7:30pm, Wednesday 21 May 2025 (31 Ordibehesht 1404)
Venue: Online
Link
https://www.skyroom.online/ch/schoolofphysics/colloquium
Abstract
I will argue that the usual effective field theory techniques break down in the rapdily expanding background of the early universe. The TCC ("Trans-Planckian Censorship Criterion") plays a key role in the argument. I will then discuss an attempt to obtain an emerging metric space-time and early universe cosmology starting from a quantum mechanical matrix model.
www.skyroom.online
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Forwarded from Mathematical Musings
توی این سایت می تونید مقالات arXiv رو براساس فرمول مورد نظرتون سرچ کنید. فیلتر هم داره...
https://arxiv.noethia.com/
https://arxiv.noethia.com/
I currently have grant funding to support postdoctoral researchers at Xinjiang Astronomical Observatory (XAO), " http://english.xao.ac.cn/ ", Urumqi city.
Our group's research focuses on the following topics:
1. Multi-wavelength, multi-scale studies to understand BH accretion, jet formation mechanism and feedback to the galaxy.
2. IMBH/candidates and BHXB accretion-jet activities.
3. Dual/triple-AGN/SMBH identifications and cosmological implications.
4. BH gravity testing.
5. AGN feedback in the view of HI.
6. Slow and Fast Transients with QTT and VLBI follow-up (SLOFT-QTT), mainly focusing on TDE, BHXB, FRB, GRB...
We also develop and run SKA simulations in advance of real data.
Interested candidates are invited to submit their applications via email at " mghasemin@xao.ac.cn ".
Masoumeh Ghasemi-Nodehi
Xinjiang Astronomical Observatory (XAO), Chinese Academy of Sciences (CAS)
Our group's research focuses on the following topics:
1. Multi-wavelength, multi-scale studies to understand BH accretion, jet formation mechanism and feedback to the galaxy.
2. IMBH/candidates and BHXB accretion-jet activities.
3. Dual/triple-AGN/SMBH identifications and cosmological implications.
4. BH gravity testing.
5. AGN feedback in the view of HI.
6. Slow and Fast Transients with QTT and VLBI follow-up (SLOFT-QTT), mainly focusing on TDE, BHXB, FRB, GRB...
We also develop and run SKA simulations in advance of real data.
Interested candidates are invited to submit their applications via email at " mghasemin@xao.ac.cn ".
Masoumeh Ghasemi-Nodehi
Xinjiang Astronomical Observatory (XAO), Chinese Academy of Sciences (CAS)
english.xao.ac.cn
Xinjiang Astronomical Observatory
Xinjiang Astronomy Observatory、Chinese Academy of Sciences Research at XAO is comprised of three divisions: Radio Astronomy Research Division, Optical Astronomy Research Division and Computer Application Research Division. Each division is made up of several…
School of Physics: HEPCo Weekly Seminar Series
Title of talk
Shining the Neutrino Flashlight into the Darkest Places
تاباندن پرتو نوترینو به تاریکترین (ناشناخته ترین) مکانها
Date and time
Tuesday, June 3rd, 2025 (13 Khordad), 2:00 pm (Tehran zone)
Link
https://www.skyroom.online/ch/schoolofphysics/highenergyseminar
Abstract
The most phenomenologically important properties of neutrinos are the facts that they don't interact with regular matter very much and that they change which charged lepton they like to interact with during propagation. The presence of matter does modify the propagation of neutrinos, somewhat, and I use this fact along with known oscillation parameters to probe environments that cannot be otherwise directly probed. In particular, I will show how low energy atmospheric neutrinos provide information about the Earth's core and that this can be determined by DUNE. I will also use current data from solar neutrino experiments, constrained by reactor neutrino data, to determine the density in the core of the Sun via neutrinos for the first time, as well as future sensitivities.
Title of talk
Shining the Neutrino Flashlight into the Darkest Places
تاباندن پرتو نوترینو به تاریکترین (ناشناخته ترین) مکانها
Date and time
Tuesday, June 3rd, 2025 (13 Khordad), 2:00 pm (Tehran zone)
Link
https://www.skyroom.online/ch/schoolofphysics/highenergyseminar
Abstract
The most phenomenologically important properties of neutrinos are the facts that they don't interact with regular matter very much and that they change which charged lepton they like to interact with during propagation. The presence of matter does modify the propagation of neutrinos, somewhat, and I use this fact along with known oscillation parameters to probe environments that cannot be otherwise directly probed. In particular, I will show how low energy atmospheric neutrinos provide information about the Earth's core and that this can be determined by DUNE. I will also use current data from solar neutrino experiments, constrained by reactor neutrino data, to determine the density in the core of the Sun via neutrinos for the first time, as well as future sensitivities.
www.skyroom.online
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WebRTC Powered Conferencing App
🇦🇺 Macquarie University is seeking outstanding candidates for PhD and Masters of Research scholarships commencing between January and June 2026 🇦🇺
Macquarie University is ranked #133 in the world, and our astronomy and astrophysics research group is one of the best in Australia. We offer PhD and Masters by Research degrees on topics ranging from exoplanets to the most distant galaxies, star formation to stellar death, the evolution of our Milky Way Galaxy, astronomical instrumentation, and more. Many projects are offered through Australian Astronomical Optics (AAO), a recognised world leader in innovative astronomical instrumentation, software and research, or offered jointly with CSIRO Space & Astronomy, who operate Australia’s national radio astronomical observatories. Successful applicants will join a diverse group of researchers and students from all over the world. We actively strive to create an equitable, inclusive and welcoming environment to all who work and study with us.
For our research areas see here. A representative but incomplete list of potential graduate projects can be found here.
https://www.mq.edu.au/research/research-centres-groups-and-facilities/centres/astrophysics-and-space-technologies/our-research-areas
Scholarships are awarded on a competitive basis, and cover tuition fees and a tax-free living allowance of AU$38,500 per year (approximately US$23,800).
Please email your expression of interest to astrohdrinfo@mq.edu.au no later than 2 July 2025. YOU MUST ATTACH your undergraduate and Masters level trannoscripts, a short CV, and a list of up to three topic areas you are interested in.
Competitive candidates will be connected with relevant supervisors and mentored through the separate application process, for the University-wide application deadline of 31 July 2025. Assessment of applications will begin on 16 June 2025, and early submission will provide the review panel more time to identify suitable supervisors and begin the university application process.
Macquarie University is ranked #133 in the world, and our astronomy and astrophysics research group is one of the best in Australia. We offer PhD and Masters by Research degrees on topics ranging from exoplanets to the most distant galaxies, star formation to stellar death, the evolution of our Milky Way Galaxy, astronomical instrumentation, and more. Many projects are offered through Australian Astronomical Optics (AAO), a recognised world leader in innovative astronomical instrumentation, software and research, or offered jointly with CSIRO Space & Astronomy, who operate Australia’s national radio astronomical observatories. Successful applicants will join a diverse group of researchers and students from all over the world. We actively strive to create an equitable, inclusive and welcoming environment to all who work and study with us.
For our research areas see here. A representative but incomplete list of potential graduate projects can be found here.
https://www.mq.edu.au/research/research-centres-groups-and-facilities/centres/astrophysics-and-space-technologies/our-research-areas
Scholarships are awarded on a competitive basis, and cover tuition fees and a tax-free living allowance of AU$38,500 per year (approximately US$23,800).
Please email your expression of interest to astrohdrinfo@mq.edu.au no later than 2 July 2025. YOU MUST ATTACH your undergraduate and Masters level trannoscripts, a short CV, and a list of up to three topic areas you are interested in.
Competitive candidates will be connected with relevant supervisors and mentored through the separate application process, for the University-wide application deadline of 31 July 2025. Assessment of applications will begin on 16 June 2025, and early submission will provide the review panel more time to identify suitable supervisors and begin the university application process.
Macquarie University
Our research areas
Our research centre brings together researchers and students on projects across multiple diverse astronomical field specialties. Find out more about them.
We are pleased to announce a one-day crash course hosted by the School of Quantum Physics and Matter at IPM.
This course will provide an introduction to the Mathematica xAct package with a focus on its applications in gravitational physics.
Course Details:
Title: Introduction to Mathematica xAct Package and Applications in Gravitational Physics
Lecturer: Dr. Sajad Aghapour [Max Planck Institute for Gravitational Physics (AEI)]
Date: 2 September 2025 - Morming session 9-12, Afternoon session 14-17 (including coffee breaks provided by IPM)
Venue: Classroom A, Farmanieh Campus, IPM
Prerequisites
Working knowledge of Mathematica
Familiarity with General Relativity
Bring your laptop and Install the xAct package on Mathematica
If you are interested in attending, please register by completing the form below.
https://forms.gle/17rAPVdySo7Embv56
We look forward to your participation.
This course will provide an introduction to the Mathematica xAct package with a focus on its applications in gravitational physics.
Course Details:
Title: Introduction to Mathematica xAct Package and Applications in Gravitational Physics
Lecturer: Dr. Sajad Aghapour [Max Planck Institute for Gravitational Physics (AEI)]
Date: 2 September 2025 - Morming session 9-12, Afternoon session 14-17 (including coffee breaks provided by IPM)
Venue: Classroom A, Farmanieh Campus, IPM
Prerequisites
Working knowledge of Mathematica
Familiarity with General Relativity
Bring your laptop and Install the xAct package on Mathematica
If you are interested in attending, please register by completing the form below.
https://forms.gle/17rAPVdySo7Embv56
We look forward to your participation.
Google Docs
Crash course on "Introduction to Mathematica xAct package"
Title: "Tensor calculus with Mathematica xAct package",
Lecturer: Dr Sajad Aghapour
Date: 2 September 2025
Venue: Class A, Farmanieh campus, IPM
Email: qpm [at] ipm.ir
Lecturer: Dr Sajad Aghapour
Date: 2 September 2025
Venue: Class A, Farmanieh campus, IPM
Email: qpm [at] ipm.ir
به اطلاع میرساند "مدرسهٔ ملی علوم اطلاعات کوانتومی" با همکاری پژوهشکدهٔ فیزیک کوانتومی و ماده و شاخهٔ علوم و فناوری اطلاعات کوانتومی انجمن فیزیک ایران، در ۱۸ و ۱۹ بهمن ماه ۱۴۰۴ در پژوهشگاه دانشهای بنیادی برگزار میشود. هدف این مدرسه ارتقای دانش و فراهم کردن بستری برای گسترش تعاملات علمی در زمینهٔ علوم اطلاعات کوانتومی است. برنامهٔ مدرسه با بهرهگیری از مدرسان تراز اول شامل درسهای پیشرفته در زمینههای نظریهٔ اطلاعات کوانتومی، حسگری کوانتومی، ترمودینامیک کوانتومی و محاسبات کوانتومی کاربردی خواهد بود. از متخصصان و دانشجویان تحصیلات تکمیلی علاقهمند به این حوزه برای شرکت در مدرسه دعوت میشود.
لطفاً برای کسب اطلاعات بیشتر به پوستر کنفرانس (در پیوست) و برای ثبتنام، به آدرس زیر مراجعه فرمایید:
https://qpm.ipm.ac.ir/conferences/NSQIS/
مهلت ثبتنام تا پایان دی ماه ۱۴۰۴ میباشد.
لطفاً برای کسب اطلاعات بیشتر به پوستر کنفرانس (در پیوست) و برای ثبتنام، به آدرس زیر مراجعه فرمایید:
https://qpm.ipm.ac.ir/conferences/NSQIS/
مهلت ثبتنام تا پایان دی ماه ۱۴۰۴ میباشد.