www.caltech.edu Events and Seminarshttps://www.caltech.edu/campus-life-events/calendar/rss/en-usWed, 30 Oct 2024 11:00:00 -0700Dynamical Edge Modes and Entanglement in Gauge Theoryhttps://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-733Adam Ball, Perimeter Institute
I will show how the degrees of freedom of gauge theory in a finite causal diamond split into bulk and edge parts, at both the level of the symplectic form (kinematics) and the Hamiltonian (dynamics). I will then show how the edge part of the modular Hamiltonian gives a crucial contribution to the subregion partition function and the entanglement entropy, resolving certain discrepancies in the literature.
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Fri, 04 Oct 2024 11:00:00 -0700High Energy Theory Seminar@Fri Oct 4 11:00:00 2024@main.oscweb.caltech.eduHigh Energy Theory SeminarWeyl fermion on a finite latticehttps://www.caltech.edu/campus-life-events/calendar/high-energy-physics-seminar-90192Srimoyee Sen, Iowa State University
Chiral symmetry is hard to engineer on the lattice. The origin of this problem can be traced to the Nielsen Ninomiya theorem which in its most naive form forbids the existence of unpaired Weyl fermions on the lattice. As a result, a general prescription for regulating chiral gauge theories (e.g. the standard model) on the lattice has remained elusive for the last fifty years. I will discuss a recent proposal that has brought us very close to solving this long-standing problem. The proposal involves considering the discretized Hamiltonian for a Wilson fermion in (2+1) dimensions with a (1+1) dimensional boundary and continuous time. Remarkably, the low-lying boundary spectrum is Weyl-like: it has a linear dispersion relation and definite chirality and circulates in only one direction around the boundary. I discuss how these results while being consistent with the Nielsen Ninomiya theorem remove a major obstacle facing the program of regulating chiral gauge theories on the lattice.
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom link.Mon, 07 Oct 2024 16:00:00 -0700High Energy Physics Seminar@Mon Oct 7 16:00:00 2024@main.oscweb.caltech.eduHigh Energy Physics SeminarStrings near the conformal boundary of AdS3.https://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-738Vit Sriprachyakul, ETH Zurich
I will discuss recent development in AdS3/CFT2 duality with pure, non-minimal NSNS flux. This comes from adopting a certain approximation. I will describe how such an approximation allows us to deduce the dual CFT. I will also discuss what happens when we add supersymmetry and when we consider excited states.
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Wed, 09 Oct 2024 11:00:00 -0700High Energy Theory Seminar@Wed Oct 9 11:00:00 2024@main.oscweb.caltech.eduHigh Energy Theory SeminarTomasz Taylorhttps://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-734Tomasz Taylor, Northeastern University
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Fri, 11 Oct 2024 11:00:00 -0700High Energy Theory Seminar@Fri Oct 11 11:00:00 2024@main.oscweb.caltech.eduHigh Energy Theory SeminarTBAhttps://www.caltech.edu/campus-life-events/calendar/high-energy-physics-seminar-90193Floria Piegsa, University of Bern
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom link.Mon, 14 Oct 2024 16:00:00 -0700High Energy Physics Seminar@Mon Oct 14 16:00:00 2024@main.oscweb.caltech.eduHigh Energy Physics SeminarTBAhttps://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-739Wei Bu, Northeastern University
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Wed, 16 Oct 2024 11:00:00 -0700High Energy Theory Seminar@Wed Oct 16 11:00:00 2024@main.oscweb.caltech.eduHigh Energy Theory SeminarHigh Energy Physics Seminarhttps://www.caltech.edu/campus-life-events/calendar/high-energy-physics-seminar-90194Sarunas Verner, University of Florida
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom link.Mon, 21 Oct 2024 16:00:00 -0700High Energy Physics Seminar@Mon Oct 21 16:00:00 2024@main.oscweb.caltech.eduHigh Energy Physics SeminarTBAhttps://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-740Liza Rozenberg, Harvard University
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Wed, 23 Oct 2024 11:00:00 -0700High Energy Theory Seminar@Wed Oct 23 11:00:00 2024@main.oscweb.caltech.eduHigh Energy Theory SeminarTBAhttps://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-742Yiwen Huang, UC San Diego
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Wed, 23 Oct 2024 12:30:00 -0700High Energy Theory Seminar@Wed Oct 23 12:30:00 2024@main.oscweb.caltech.eduHigh Energy Theory SeminarTensionless AdS_3/CFT_2 and Single Trace TTbarhttps://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-735Andrea Dei, University of Chicago
One of the best understood AdS/CFT incarnations relates tensionless k=1 strings on AdS_3 to a symmetric product CFT_2. I will discuss an exact duality between string theory on a spacetime which is not asymptotically AdS and a non-conformal field theory. The bulk theory is constructed as a marginal deformation of the k=1 AdS_3 string, while the spacetime dual is a single trace TT-deformed symmetric orbifold theory. As evidence for the duality, I am going to show the exact match of the one-loop bulk and boundary torus partition functions.
Based on 2408.00823 in collaboration with Bob Knighton, Kiarash Naderi and Savdeep Sethi.
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Fri, 25 Oct 2024 11:00:00 -0700High Energy Theory Seminar@Fri Oct 25 11:00:00 2024@main.oscweb.caltech.eduHigh Energy Theory SeminarTBAhttps://www.caltech.edu/campus-life-events/calendar/high-energy-theory-seminar-741Chintan Patel, TIFR Mumbai/KITP
The talk is in 469 Lauritsen.
Contact theoryinfo@caltech.edu for Zoom information.
Wed, 30 Oct 2024 11:00:00 -0700High Energy Theory Seminar@Wed Oct 30 11:00:00 2024@main.oscweb.caltech.eduHigh Energy Theory Seminar