# Seminars & Colloquia Calendar

## Long-range Ising model and relatives: a renormalization-group laboratory

#### Slava Rychkov (IHES and ENS)

Location: ** zoom**

Date & time: Wednesday, 02 June 2021 at 10:45AM - 11:45AM

It would be nice one day to prove that lattice models with short-range interactions, such as the 2d or 3d Ising model, possess a renormalization-group fixed point. But it’s hard, since these fixed points are strongly coupled. The situation is better for the long-range Ising model, where the spin-spin interaction is powerlike. Tuning the power one can make the fixed point weakly coupled. Weakly coupled non-gaussian fixed points in the scalar field theory with a non-local kinetic term and a quartic interactions have been constructed 20 years ago by Brydges et al. Similar fermionic fixed points have been considered by Gawedzki and Kupiainen in mid-80’s. Recently Alessandro Giuliani, Vieri Mastropietro and myself have revisited the problem of fermionic fixed points in arXiv:2008.04361. We have proved that, at weak coupling, the fixed point is analytic in epsilon (the deviation from marginality). I will review what is known or conjectured about bosonic and fermionic long-range fixed points. In particular I will discuss the long-range to short-range crossover.

Chiara Damiolini, Ian Coley and Franco Rota -Charles Weibel Organizer's Page

Brooke Logan

Wujun Zhang Organizer's webpage

P. Gupta, X.Huang and J. Song Organizer's webpage

Swastik Kopparty, Sepehr Assadi Seminar webpage

Jeffry Kahn, Bhargav Narayanan, Jinyoung Park Organizer's webpage

Brooke Ogrodnik, Website

Robert Dougherty-Bliss and Doron Zeilberger --> homepage

Paul Feehan, Daniel Ketover, Natasa Sesum Organizer's webpage

Lev Borisov, Emanuel Diaconescu, Angela Gibney, Nicolas Tarasca, and Chris Woodward Organizer's webpage

Jason Saied Seminar webpage

Brian Pinsky, Rashmika Goswami website

Quentin Dubroff Organizer's webpage

James Holland; Organizer website

Edna Jones Organizer's webpage

Brooke Ogrodnik website

Yanyan Li, Zheng-Chao Han, Jian Song, Natasa Sesum Organizer's Webpage

Organizer: Luochen Zhao

Yanyan Li, Zheng-Chao Han, Natasa Sesum, Jian Song Organizer's Page

Lisa Carbone, Yi-Zhi Huang, James Lepowsky, Siddhartha Sahi Organizer's webpage

Simon Thomas website

Kasper Larsen, Daniel Ocone and Kim Weston Organizer's page

Joel Lebowitz, Michael Kiessling

Yanyan Li, Haim Brezis Organizer's Webpage

Stephen D. Miller, John C. Miller, Alex V. Kontorovich, Alex Walker seminar website

Stephen D. Miller

Brooke Ogrodnik, Website

Organizers: Yanyan Li, Z.C. Han, Jian Song, Natasa Sesum

Yael Davidov Seminar webpage

Kristen Hendricks, Xiaochun Rong, Hongbin Sun, Chenxi Wu Organizer's page

Fioralba Cakoni Seminar webpage

Ebru Toprak, Organizer

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