2–27 May 2016
Nordita, Stockholm
Europe/Stockholm timezone

Turning a corner on entanglement entropy

12 May 2016, 10:00
1h
122:026 (Nordita, Stockholm)

122:026

Nordita, Stockholm

Speaker

Roger Melko

Description

he entanglement entropy of a quantum critical system receives a logarithmic contribution when the entangling boundary contains a sharp corner.  Numerical calculations indicate that for the Wilson-Fisher fixed point in 2+1 dimensions, the coefficient of this logarithm is universal and contains low-energy information, scaling for example with the number of vector components of the field theory.  Recently, these numerical results have been confirmed analytically, revealing a relationship between the corner coefficient and a central charge defined from the stress tensor two-point function. The combination of analytical understanding and easy numerical accessibility promises to make the corner entanglement an important theoretical tool, providing a new window on universality for free and interacting systems alike.

Presentation materials

There are no materials yet.