Name: Defects, from condensed matter to quantum gravity
Start: 2024-06-10T09:00:00+02:00
End: 2024-06-14T19:00:00+02:00
Location: Castello dei Principi Capano

Defects, from condensed matter to quantum gravity

from Monday, 10 June 2024 (09:00) to Friday, 14 June 2024 (19:00)

Monday, 10 June 2024
10:00 Line defects in CFTs: RG flows, cusps, and applications - Gabriel Cuomo (New York U., CCPP and Princeton U.)
Line defects in CFTs: RG flows, cusps, and applications
- Gabriel Cuomo (New York U., CCPP and Princeton U.)
10:00 - 11:00
Line defects describe one-dimensional probes of a quantum field theory. Physically interesting examples can be found in different systems, ranging from magnets to gauge theories. In this talk, I will discuss some general properties of line defects, including the monotonicity of the defect renormalization group flow and the structure of the cusp anomalous dimension. I will illustrate the general results by discussing the magnetic line defect in the O(N) CFT. If time permits I will mention additional examples.
11:00 Coffee break
Coffee break
11:00 - 11:30
11:30 TBA - Carlo Meneghelli (University of Parma)
TBA
- Carlo Meneghelli (University of Parma)
11:30 - 12:30
12:30 Lunch
Lunch
12:30 - 14:30

14:30

14:30 - 16:00

16:00 Coffee break
Coffee break
16:00 - 16:30
Tuesday, 11 June 2024
10:00 Defects in quantum systems: symmetry, entanglement, and teleportation - Sara Murciano (Caltech)
Defects in quantum systems: symmetry, entanglement, and teleportation
- Sara Murciano (Caltech)
10:00 - 11:00
In this talk, I will explore the significant role of defects in various aspects of quantum systems. First, I will discuss how global symmetries can be embedded in topological defects and their connection to symmetry-resolved entanglement. Next, I will examine the influence of conformal junctions on various entanglement measures, highlighting how these insertions can affect quantum correlations. Finally, I will delve into the realm of weak measurements of critical wavefunctions, emphasizing their interplay with defect lines. As a concrete example, I will demonstrate how defects can disrupt a quantum teleportation protocol, preventing Alice from successfully transmitting her state to Bob. Through these discussions, I plan to shed light on the connections between defects and fundamental quantum phenomena.
11:00 Coffee break
Coffee break
11:00 - 11:30
11:30 Universal Bounds in interface conformal field theories - Andreas Karch (U. Texas, Austin)
Universal Bounds in interface conformal field theories
- Andreas Karch (U. Texas, Austin)
11:30 - 12:30
Critical phenomena in the presence of interfaces provide a much richer arena than their more studied cousin of boundary critical phenomena. In this talk, I'll review certain observables that are new and unique in interface conformal field theory and then demonstrate some novel bounds we can derive on these quantities using techniques from holography and quantum information.
12:30 Lunch
Lunch
12:30 - 14:30

14:30

14:30 - 16:00

16:00 Coffee break
Coffee break
16:00 - 16:30
Wednesday, 12 June 2024
10:00 TBA - Giuseppe Policastro (Ecole Normale Superieure)
TBA
- Giuseppe Policastro (Ecole Normale Superieure)
10:00 - 11:00
11:00 Coffee break
Coffee break
11:00 - 11:30
11:30 TBA - Meng Cheng (Yale University)
TBA
- Meng Cheng (Yale University)
11:30 - 12:30
12:30 Lunch
Lunch
12:30 - 14:30

14:30 Free afternoon
Free afternoon
14:30 - 17:30
Thursday, 13 June 2024
10:00 Solving conformal defect using the fuzzy sphere regularization - Yin-Chen He (Perimeter Institute)
Solving conformal defect using the fuzzy sphere regularization
- Yin-Chen He (Perimeter Institute)
10:00 - 11:00
In this talk, I will introduce our recently proposed fuzzy sphere regularization of 3D CFTs and talk about its application to the conformal defect. Specifically, I will use the pinning field defect of 3D Ising as an example to demonstrate the versatility of fuzzy sphere regularization in the study of defect, including the computation of operator spectrum, bulk-defect OPE and g-function.
11:00 Coffe break
Coffe break
11:00 - 11:30
11:30 CFT1/QFT2: massless scattering and bulk RG flows - Miguel Paulos (ENS)
CFT1/QFT2: massless scattering and bulk RG flows
- Miguel Paulos (ENS)
11:30 - 12:30
In this talk we discuss how it is possible to study QFTs in AdS2 (or 2d BCFTs), and in particular their flat space limit, by accurately bootstrapping 1d CFTs. We also show how combining crossing with locality allows one not only to reconstruct bulk scattering but also local operators and their correlation functions at all scales, and recover their flat space form. We discuss the physical meaning of these results, their limitations, and their relation to bounds on CFT/QFT data. Along the way we explain how both the 1d (single correlator) crossing equation and the associated bulk operator reconstruction problem are now essentially solved.
12:30 Lunch
Lunch
12:30 - 14:30

14:30

14:30 - 16:30

16:30 Coffee break
Coffee break
16:30 - 17:00

19:30 Conference dinner
Conference dinner
19:30 - 21:30
Friday, 14 June 2024
10:00 TBA - Francesco Parisen Toldin (Aachen University)
TBA
- Francesco Parisen Toldin (Aachen University)
10:00 - 11:00
11:00 Coffee break
Coffee break
11:00 - 11:30

11:30

11:30 - 12:30

12:30 Lunch
Lunch
12:30 - 14:30