String Theory & Holography
سخنرانی تخصصی موضوع: یادگیری ماشین و نظریه میدان ریسمان ارائه دهنده: Harold Erbin (MIT and IAIFI) . @sth_fum
https://arxiv.org/abs/2405.19421
امروز مقالهای مروری دربارهی نظریهی میدان ریسمان (String Field theory) روی آرکایو منتشر شد. نویسندگان مقاله هردو از پیشگامان این حوزه از ریسمان هستند. به نظر میرسد این مقاله مروری با توجه به بلوغ روز افزون نظریه، دیدگاهی جامع از جنبههای مختلفی که در سالهای اخیر مورد تمرکز بوده ارائه کند.
@sth_fum
لینک سخنرانی مجازی Harold Erbin در دانشگاه فردوسی مشهد درباره این موضوع: اینجا ضربه بزنید.
.
امروز مقالهای مروری دربارهی نظریهی میدان ریسمان (String Field theory) روی آرکایو منتشر شد. نویسندگان مقاله هردو از پیشگامان این حوزه از ریسمان هستند. به نظر میرسد این مقاله مروری با توجه به بلوغ روز افزون نظریه، دیدگاهی جامع از جنبههای مختلفی که در سالهای اخیر مورد تمرکز بوده ارائه کند.
@sth_fum
لینک سخنرانی مجازی Harold Erbin در دانشگاه فردوسی مشهد درباره این موضوع: اینجا ضربه بزنید.
.
arXiv.org
String Field Theory: A Review
As of today there exist consistent, gauge-invariant string field theories describing all string theories: bosonic open and closed strings, open superstrings, heterotic strings and type II strings....
IISc physicists discover new method to represent 'pi' using string theory https://www.indiatoday.in/education-today/news/story/iisc-physicists-discover-new-method-to-represent-pi-using-string-theory-2555732-2024-06-20
@sth_fum
@sth_fum
India Today
IISc physicists discover new method to represent 'pi' using string theory
IISc physicists has discovered a new series representation for pi while researching string theory, simplifying calculations in quantum physics.
🔶🔵Title: Beyond Standard Model (SM) models as Dark Matter candidate and phenomenology of vector Dark Matter.
👨🏫Presenter: Amir Amiri (FUM)
🕰Time & Date: Monday, July 8th, 2024 (Tir 18th, 1403), 2:00 pm (Tehran zone)
📍Location: Ferdowsi University, Faculty of Science, Physics Department, Room 14 ( in person )
📄Abstract: In this presentation, we want to discuss the different approaches and models as dark matter candidates, especially the Beyond Standard model (SM). At the end, we will have a look at the phenomenology of the subGeV vector dark matter Model.
@sth_fum
👨🏫Presenter: Amir Amiri (FUM)
🕰Time & Date: Monday, July 8th, 2024 (Tir 18th, 1403), 2:00 pm (Tehran zone)
📍Location: Ferdowsi University, Faculty of Science, Physics Department, Room 14 ( in person )
📄Abstract: In this presentation, we want to discuss the different approaches and models as dark matter candidates, especially the Beyond Standard model (SM). At the end, we will have a look at the phenomenology of the subGeV vector dark matter Model.
@sth_fum
🔵Title: Geometric Quantization and Its Application In AdS3 Gravity
👨🏫Presenter: Mahboubeh Abbasi (FUM)
🕰Time & Date: Wednesday, July 31st, 2024 (Mordad 10th, 1403), 10:00 AM (Tehran zone)
📍Location: Ferdowsi University, Faculty of Science, Physics Department, Room 14 (in person)
📄Abstract: Quantization is an important theme in many areas of mathematics and physics. Geometric quantization aims to associate to any classical phase space, modeled by a symplectic manifold, a quantum space, modeled by a Hilbert space. A relevant feature of geometric quantization is its close relationship with the theory of irreducible unitary representations of Lie groups. In fact, by the geometric quantization process of coadjoint orbits of a given Lie group, one can obtain its irreducible unitary representations which is known as the orbit method.
In this thesis, by using this method, we describe irreducible unitary representations of Poincaré and Galilean groups which are known as relativistic and non-relativistic particles, respectively. Then we study the Virasoro group which is a part of the asymptotic symmetry group of many gravitational systems and two-dimensional conformal field theories.
@sth_fum
👨🏫Presenter: Mahboubeh Abbasi (FUM)
🕰Time & Date: Wednesday, July 31st, 2024 (Mordad 10th, 1403), 10:00 AM (Tehran zone)
📍Location: Ferdowsi University, Faculty of Science, Physics Department, Room 14 (in person)
📄Abstract: Quantization is an important theme in many areas of mathematics and physics. Geometric quantization aims to associate to any classical phase space, modeled by a symplectic manifold, a quantum space, modeled by a Hilbert space. A relevant feature of geometric quantization is its close relationship with the theory of irreducible unitary representations of Lie groups. In fact, by the geometric quantization process of coadjoint orbits of a given Lie group, one can obtain its irreducible unitary representations which is known as the orbit method.
In this thesis, by using this method, we describe irreducible unitary representations of Poincaré and Galilean groups which are known as relativistic and non-relativistic particles, respectively. Then we study the Virasoro group which is a part of the asymptotic symmetry group of many gravitational systems and two-dimensional conformal field theories.
@sth_fum
گروهی از دانشگاه استنفورد بستری را فراهم کردهاند که میتوان برای قسمتهای مختلف مقالات در سایت آرکایو arXiv، سوالات یا نظرات را مطرح کرد و در یک گفت و گو در این باره شرکت کرد.
متن اعلامیه شروع این بستر به شرح زیر است:
arXiv -> alphaXiv
Students at Stanford have built alphaXiv, an open discussion forum for arXiv papers.
You can post questions and comments directly on top of any arXiv paper by changing arXiv to alphaXiv in any URL!
@sth_fum
متن اعلامیه شروع این بستر به شرح زیر است:
arXiv -> alphaXiv
Students at Stanford have built alphaXiv, an open discussion forum for arXiv papers.
You can post questions and comments directly on top of any arXiv paper by changing arXiv to alphaXiv in any URL!
@sth_fum
String Theory & Holography
گروهی از دانشگاه استنفورد بستری را فراهم کردهاند که میتوان برای قسمتهای مختلف مقالات در سایت آرکایو arXiv، سوالات یا نظرات را مطرح کرد و در یک گفت و گو در این باره شرکت کرد. متن اعلامیه شروع این بستر به شرح زیر است: arXiv -> alphaXiv Students at Stanford…
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String Theory & Holography
ویدیویی از فضای این بستر جدید. @sth_fum
صرفا با تغییر
arXiv
به
alphaXiv
در صفحه مقاله مورد نظر به این محیط وارد میشوید. برای استفاده از این سایت باید ثبت نام کنید.
در صورتی که با پیامی مبنی بر نبودن دامنه ایمیل شما در لیست ایمیلهای این سایت مواجه شدید صرفا عملیات ثبت نام را ادامه دهید و توجه به این هشدار نکنید.
برای نمونه من مقاله آخر ویتن را در این سایت باز کردم:
https://alphaxiv.org/pdf/2407.20964
@sth_fum
arXiv
به
alphaXiv
در صفحه مقاله مورد نظر به این محیط وارد میشوید. برای استفاده از این سایت باید ثبت نام کنید.
در صورتی که با پیامی مبنی بر نبودن دامنه ایمیل شما در لیست ایمیلهای این سایت مواجه شدید صرفا عملیات ثبت نام را ادامه دهید و توجه به این هشدار نکنید.
برای نمونه من مقاله آخر ویتن را در این سایت باز کردم:
https://alphaxiv.org/pdf/2407.20964
@sth_fum
alphaXiv
Online movement adaptation based on previous sensor experiences | alphaXiv
Comment directly on top of arXiv papers.
String Theory & Holography
@sth_fum
🔵Title: Effective action of bosonic string theory at order $\alpha'^{2}$
👨🏫Presenter: Hadi Gholian (FUM)
🕰Time & Date: Saturday, August 3rd, 2024 (Mordad 13th, 1403), 10:00 AM IRST
📍Location: Ferdowsi University, Faculty of Science, Physics Department, Management office
📄Abstract: In this lecture, the results of PhD thesis will be presented:
First, we explain how the couplings of second-order bosonic and heterotic actions, obtained by T-duality, can be reduced to the minimum possible number, by means of the redefinition of fields, Bianchi identities, and total derivative terms. Then, by calculating the Feynman diagram of these couplings, the scattering amplitude for 6 B-fields in the field theory will be calculated. Then we compare the results with the string theory S-matrix scattering amplitude of six closed strings. To do this, we explain how to calculate triple hypergeometric integrals.
@sth_fum
👨🏫Presenter: Hadi Gholian (FUM)
🕰Time & Date: Saturday, August 3rd, 2024 (Mordad 13th, 1403), 10:00 AM IRST
📍Location: Ferdowsi University, Faculty of Science, Physics Department, Management office
📄Abstract: In this lecture, the results of PhD thesis will be presented:
First, we explain how the couplings of second-order bosonic and heterotic actions, obtained by T-duality, can be reduced to the minimum possible number, by means of the redefinition of fields, Bianchi identities, and total derivative terms. Then, by calculating the Feynman diagram of these couplings, the scattering amplitude for 6 B-fields in the field theory will be calculated. Then we compare the results with the string theory S-matrix scattering amplitude of six closed strings. To do this, we explain how to calculate triple hypergeometric integrals.
@sth_fum
🌐 ما را در شبکه های اجتماعی دنبال کنید:
Telegram: @sth_fum
Instagram: sth.fum
Aparat: sth_um
Youtube: sth_fum
Telegram: @sth_fum
Instagram: sth.fum
Aparat: sth_um
Youtube: sth_fum
آپارات - سرویس اشتراک ویدیو
آپارات | گروه ریسمان و هولوگرافی دانشگاه فردوسی
سلام
🔵 قابل توجه دانشجوهای دکتری و محققان پسادکتری در گرایش ریسمان و هولوگرافی (دقت کنید این یک برنامه برای همکاری در کار تحقیقاتی نیست) :
Dear colleague,
Are you a PhD student or postdoctoral fellow who feels would benefit from guidance on your academic career, work-life balance, or other challenges from an experienced researcher within our string theory community? Or, are you a postdoc or faculty member who feels you can support a younger scientist in navigating their academic journey?
Consider applying to "Quantum Guides," a mentoring program designed specifically for the string theory community.
https://sites.google.com/view/mentoring-program-string-th/home
Applications are open until September 15. The program is open to everyone, but it is targeted to underrepresented groups.
We hope to count with you in this new academic year. Please forward this email to whoever might be interested (in particular, we seek mentors to accommodate the increasing global demand of mentees).We also apologize if you receive this email more than once.
Best regards,
Mariana Grana and Irene Valenzuela (program coordinators)
@sth_fum
🔵 قابل توجه دانشجوهای دکتری و محققان پسادکتری در گرایش ریسمان و هولوگرافی (دقت کنید این یک برنامه برای همکاری در کار تحقیقاتی نیست) :
Dear colleague,
Are you a PhD student or postdoctoral fellow who feels would benefit from guidance on your academic career, work-life balance, or other challenges from an experienced researcher within our string theory community? Or, are you a postdoc or faculty member who feels you can support a younger scientist in navigating their academic journey?
Consider applying to "Quantum Guides," a mentoring program designed specifically for the string theory community.
https://sites.google.com/view/mentoring-program-string-th/home
Applications are open until September 15. The program is open to everyone, but it is targeted to underrepresented groups.
We hope to count with you in this new academic year. Please forward this email to whoever might be interested (in particular, we seek mentors to accommodate the increasing global demand of mentees).We also apologize if you receive this email more than once.
Best regards,
Mariana Grana and Irene Valenzuela (program coordinators)
@sth_fum
Google
String theory Mentoring
QuantumGuides
Mentoring program @String community
Mentoring program @String community
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 علمی فیزیک دانشگاه فردوسی (Fatere Asghari)
🔻 کافه فیزیک با همکاری انگاریوم و انجمن علمی فیزیک برگزار میکند:
جلسه ۴۵ام:
▫️طرحهای کاشیکاری؛ چگونه میتوانیم یک صفحهی دوبعدی را با تکرار یک شکل بپوشانیم؟!
👤سخنران: خانم دکتر ملیحه سیاوشان؛ دکتری فیزیک، نظریه ریسمان
❗️توجه❗️: این جلسات به صورت رایگان و یک بار در ماه برگزار میشود و مناسب علاقهمندان فیزیک و افراد ۱۵ سال به بالاست.
هدف اصلی این نشست، بررسی مفاهیم فیزیک به زبان سادهتر بوده؛ به طوری که عموما برای فهم مطالب آن نیاز به داشتن تحصیلات دانشگاهی فیزیک نخواهید داشت.
این جلسات به صورت گفتگو محور بوده و تمامی شرکت کنندگان میتوانند در مباحث مشارکت داشته باشند.
🗓تاریخ: شنبه ۷ مهرماه
🕛زمان: ساعت ۱۸
📍مکان: انگاریوم، آسماننمای دانشگاه فردوسی مشهد
#انجمن_علمی_فیزیک
#کافه_فیزیک
🆔 @Physics_um
🆔 @OlomFum
🆔 @Ssafum
🆔 @Physicscafe_mhd
🆔 @Engarium360
جلسه ۴۵ام:
▫️طرحهای کاشیکاری؛ چگونه میتوانیم یک صفحهی دوبعدی را با تکرار یک شکل بپوشانیم؟!
👤سخنران: خانم دکتر ملیحه سیاوشان؛ دکتری فیزیک، نظریه ریسمان
❗️توجه❗️: این جلسات به صورت رایگان و یک بار در ماه برگزار میشود و مناسب علاقهمندان فیزیک و افراد ۱۵ سال به بالاست.
هدف اصلی این نشست، بررسی مفاهیم فیزیک به زبان سادهتر بوده؛ به طوری که عموما برای فهم مطالب آن نیاز به داشتن تحصیلات دانشگاهی فیزیک نخواهید داشت.
این جلسات به صورت گفتگو محور بوده و تمامی شرکت کنندگان میتوانند در مباحث مشارکت داشته باشند.
🗓تاریخ: شنبه ۷ مهرماه
🕛زمان: ساعت ۱۸
📍مکان: انگاریوم، آسماننمای دانشگاه فردوسی مشهد
#انجمن_علمی_فیزیک
#کافه_فیزیک
🆔 @Physics_um
🆔 @OlomFum
🆔 @Ssafum
🆔 @Physicscafe_mhd
🆔 @Engarium360
ضمن عرض سلام و تحیت به اعضا محترم کانال
جلسات ژرنال کلاب گروه ریسمان و هولوگرافی در نیمسال جدید از روز چهارشنبه 11 مهر، ساعت 12:00-13:00 بصورت هفتگی، چهارشنبهها در کلاس 21 دانشکده علوم برگزار خواهد شد.
حضور در این جلسات برای تمام علاقمندان آزاد و رایگان است.
@sth_fum
جلسات ژرنال کلاب گروه ریسمان و هولوگرافی در نیمسال جدید از روز چهارشنبه 11 مهر، ساعت 12:00-13:00 بصورت هفتگی، چهارشنبهها در کلاس 21 دانشکده علوم برگزار خواهد شد.
حضور در این جلسات برای تمام علاقمندان آزاد و رایگان است.
@sth_fum
Christina Rugina (University of Bucharest)*
is giving an online course on
QG/QI
Keywords for the course: entanglement, von Neumann entropy; Renyi entropy; RT surfaces; replica trick; entanglement wedge reconstruction; Tomita-Takesaki constructions; Python's Lunch; Krylov complexity; purification; DSSYK; chords; von Neumann algebras and more.
SYLLABUS
1. Lesson 1: Basics of entanglement
2. Lesson 2: Entanglement wedge reconstruction
3. Lesson 3: Tomita-Takesaki constructions. Mirror operators. State-dependence.
4. Lesson 4: Islands. Replica trick. Factorization.
5. Lesson 5: Basic complexity
6. Lesson 6: Python’s Lunch. Complexity censorship.
7. Lesson 7: Complexity and Purification.
8. Lesson 8: Purification II
9. Lesson 9: DSSYK
10. Lesson 10: Chords
11. Lesson 11: von Neumann algebras and applications - I
12. Lesson 12: von Neumann algebras and applications - II
The course will take place over zoom and there will be recordings.
First Zoom meeting: 11 October 2024 at 11 am CET
To participate, please register in advance for this meeting:
https://us06web.zoom.us/meeting/register/tZcrcOiorjIsEtMTbN4z2Xx0AE-TBnjxRLLH
After registering, you will receive a confirmation email containing information about joining the meeting. Please register by Friday, 11th October, 11 AM Bucharest time.
Please feel free to distribute the announcement in your group and elsewhere.
*Chrisitina Rugina holds a PhD in Gravitation and String Theory from University of Bucharest and is currently affiliated with this institution. She was a visiting research student at DAMTP under the supervision of Professor Gary Gibbons.
@sth_fum
is giving an online course on
QG/QI
Keywords for the course: entanglement, von Neumann entropy; Renyi entropy; RT surfaces; replica trick; entanglement wedge reconstruction; Tomita-Takesaki constructions; Python's Lunch; Krylov complexity; purification; DSSYK; chords; von Neumann algebras and more.
SYLLABUS
1. Lesson 1: Basics of entanglement
2. Lesson 2: Entanglement wedge reconstruction
3. Lesson 3: Tomita-Takesaki constructions. Mirror operators. State-dependence.
4. Lesson 4: Islands. Replica trick. Factorization.
5. Lesson 5: Basic complexity
6. Lesson 6: Python’s Lunch. Complexity censorship.
7. Lesson 7: Complexity and Purification.
8. Lesson 8: Purification II
9. Lesson 9: DSSYK
10. Lesson 10: Chords
11. Lesson 11: von Neumann algebras and applications - I
12. Lesson 12: von Neumann algebras and applications - II
The course will take place over zoom and there will be recordings.
First Zoom meeting: 11 October 2024 at 11 am CET
To participate, please register in advance for this meeting:
https://us06web.zoom.us/meeting/register/tZcrcOiorjIsEtMTbN4z2Xx0AE-TBnjxRLLH
After registering, you will receive a confirmation email containing information about joining the meeting. Please register by Friday, 11th October, 11 AM Bucharest time.
Please feel free to distribute the announcement in your group and elsewhere.
*Chrisitina Rugina holds a PhD in Gravitation and String Theory from University of Bucharest and is currently affiliated with this institution. She was a visiting research student at DAMTP under the supervision of Professor Gary Gibbons.
@sth_fum
Zoom
Welcome! You are invited to join a meeting: QG/QI course. After registering, you will receive a confirmation email about joining…
Phymaths podcast # 47 || Guest: Dr. Harold Erbin
https://www.youtube.com/watch?v=7xTeWtYX8KA
Time stamps
0:00 Coming Up
0:25 Introduction of the guest
0:46 What is String Field Theory (SFT)? Why use it?
4:05 Functional fields in SFT
6:24 Mathematical Techniques for SFT
9:27 BRST and BV action
13:12 Background independence of string theory
29:39 Using pure spinor formalism
36:10 Using machine learning for SFT
50:38 Geometric BV algebras
57:03 Training the neural network
1:14:31 Constraints on closed SFT vertices
1:18:43 QFT - Neural Network correspondence
1:28:22 UV limit for Neural Network?
1:31:37 Experience with Ashoke Sen
1:44:40 His book on SFT
1:58:22 (People's question) Is string theory the end of Physics?
2:01:14 (People's question) Learning complex manifolds
2:03:31 (People's question) Learning machine learning early
@sth_fum
https://www.youtube.com/watch?v=7xTeWtYX8KA
Time stamps
0:00 Coming Up
0:25 Introduction of the guest
0:46 What is String Field Theory (SFT)? Why use it?
4:05 Functional fields in SFT
6:24 Mathematical Techniques for SFT
9:27 BRST and BV action
13:12 Background independence of string theory
29:39 Using pure spinor formalism
36:10 Using machine learning for SFT
50:38 Geometric BV algebras
57:03 Training the neural network
1:14:31 Constraints on closed SFT vertices
1:18:43 QFT - Neural Network correspondence
1:28:22 UV limit for Neural Network?
1:31:37 Experience with Ashoke Sen
1:44:40 His book on SFT
1:58:22 (People's question) Is string theory the end of Physics?
2:01:14 (People's question) Learning complex manifolds
2:03:31 (People's question) Learning machine learning early
@sth_fum
YouTube
Phymaths podcast # 47 || Dr. Harold Erbin
*Denoscription*
Dr. Harold Erbin is a theoretical physicist who works on string field theory and string compactifications. He uses AI to solve problems in theoretical physics and is the author of the most recent book on string field theory. A list of his works…
Dr. Harold Erbin is a theoretical physicist who works on string field theory and string compactifications. He uses AI to solve problems in theoretical physics and is the author of the most recent book on string field theory. A list of his works…