Seminar on Tues., 14 December

[ivanisse]

JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR


Tuesday, 14 December    -    11:00 a.m.


SISSA, Santorio Building, Room 129 (1st Floor)


Pasquale CALABRESE (Universita' di Pisa)


"Unusual Corrections to Scaling in Entanglement Entropy"


Abstract


The study of the entanglement properties of the ground-state of an 
extended quantum system has prompted an intense research activity at the 
crossroad of different disciplines such as statistical mechanics, 
quantum information, and quantum filed theory.  Quantifying the 
entanglement allowed an elegant and finer characterization of many 
extended quantum systems.
In this talk, after reviewing the results for one-dimensional systems at 
a quantum critical point that are described by a conformal invariant 
field theory, I will consider the corrections to the asymptotic 
behavior.  I will show that leading corrections are unusual, in the 
sense that they depend (in a calculable way) on the entanglement measure 
and they arise from relevant operators induced by the conical space-time 
singularities necessary to describe the reduced density matrix.