Centre for Particle Theory Colloquia: The entanglement entropy and its universal behaviour in one dimension
11 March 2008 04:15 in CLC 202
Entanglement is a fundamental charasteristic of quantum mechanics: a
measurement at a point in space may affect instantaneously measurements
performed elsewhere in a way that cannot be described by local variables.
The entanglement entropy is a proposed measure of entanglement in a pure
quantum state, and it also occurs in the study of black hole entropy. I
will explain what entanglement entropy is and some of its basic
properties, and I will describe what happens with it for the ground state
of quantum chains near to a critical point. It is related to interesting
geometries and it turns out that it encodes neatly important universal
information about the region around the critical point.
Coffee and biscuits at 15:30 in CM 211 (Maths Coffee Room).