Found 4 result(s)

05.12.2018 (Wednesday)

How to Build the Thermofield Double State

Triangular Seminar Diego Hofman (Amsterdam)

at:
16:30 QMW
room Fogg Lecture Theatre
abstract:

Given two copies of any quantum mechanical system, one may want to prepare them in the thermofield double state for the purpose of studying thermal physics or black holes. However, the thermofield double is a unique entangled pure state and may be difficult to prepare. We propose a local interacting Hamiltonian for the combined system whose ground state is approximately the thermofield double. The energy gap for this Hamiltonian is of order the temperature. Our construction works for any quantum system satisfying the Eigenvalue Thermalization Hypothesis.

08.06.2015 (Monday)

Warped Conformal Field Theory as Lower Spin Gravity

Regular Seminar Diego Hofman (UVA)

at:
15:00 IC
room H503
abstract:

Two dimensional Warped Conformal Field Theories (WCFTs) may represent the simplest examples of field theories without Lorentz invariance that can be described holographically. As such they constitute a natural window into holography in non AdS space-times, including the near horizon geometry of generic extremal black holes. Iíll explain that WCFTs posses a type of boost symmetry. Using this insight, Iíll discuss how to couple these theories to background geometry. This geometry is not Riemannian. We call it Warped Geometry and it turns out to be a variant of a Newton-Cartan structure with additional scaling symmetries. With this formalism the equivalent of Weyl invariance in these theories will be discussed as well as examples of WCFTs. Lastly Iíll present a systematic description of the holographic duals of WCFTs. Iíll argue that the minimal setup is not Einstein gravity but an SL(2,R) x U(1) Chern-Simons Theory, which we call Lower Spin Gravity.

12.02.2014 (Wednesday)

Towards Kerr from Warped Conformal Field Theory

Triangular Seminar Diego Hofman (Amsterdam)

at:
16:30 QMW
room David Sizer LT, Francis Bancroft
abstract:

27.04.2012 (Friday)

Umklapp in AdS/CFT

Regular Seminar Diego Hofman (Harvard)

at:
14:00 IC
room H711C
abstract: