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Location: Amsterdam Science Park 904, room C1.112. Speakers: Sergei Dubovsky (NYU), Wilke van der Schee (Utrecht).

Date 26 October 2018 13:30 -18:00 Science Park 904 Location: Room C1.112

This event is part of a regular series of meetings sponsored by D-ITP with the objective of bringing together the theoretical physics communities in Amsterdam, Leiden, Utrecht and our sister nodes Groningen, Brussels (ULB and VUB), Leuven and Mons. The topic of this meeting is holography and its applications to different physical systems. We encourage researchers from different areas in theoretical physics to participate!

## Programme

### 14:00 Sergei Dubovsky (NYU)

Confining strings, $T\bar T$ deformation and 2d gravity

### 15:45 Wilke van der Schee (Utrecht)

Collisions in AdS and the Quantum Null Energy Condition

## Abstracts

### Sergei Dubovsky (NYU)

Confining strings, $T\bar T$ deformation and 2d gravity

Abstract: I will present a status report for the study of confining strings. In the beginning I will focus on confining strings in massive adjoint two-dimensional QCD, where analytical progress is most straightforward to achieve. Then I will describe lessons learnt from this study for confining strings in higher dimensions and discuss relations between confining strings, 2d gravity and $T\bar{T}$ deformation.

### Wilke van der Schee (Utrecht)

Collisions in AdS and the Quantum Null Energy Condition

Abstract: In this talk I will give an introduction to the Quantum Null Energy Condition (QNEC), which is a unique local energy condition conjectured to be valid for any QFT. QNEC relates the normal null energy condition (NEC) with the second functional null derivative of the entanglement entropy and was inspired from the second law of black hole thermodynamics, even though it is valid in QFTs without gravity. After this introduction I will present some sample computations in holography, where entanglement entropy can be computed using the dual geometry. These examples in particular includes regions in shock wave collisions, that were known to violate NEC, but are now found to saturate QNEC. I end with upcoming work on QNEC in 1+1D holographic CFTs, including leading order quantum corrections in the bulk.

Science Park 904

Room Location: Room C1.112

Science Park 904
1098 XH Amsterdam

### Organisers

Diego Hofman (Amsterdam)
Umut Gursoy (Utrecht)