"Quantum criticality: a frontier of theoretical physics" by Sudip Chakravarty (UCLA)

Date: 
Thursday, March 31, 2016 - 4:00pm to 5:00pm
Series: 
Physics and Astronomy Colloquium

Thursdays, 4:00-5:00 pm

1-434 Physics and Astronomy (map)
Reception from 3:30-4:00 p.m.
(unless otherwise posted)

Guest Speaker: Sudip Chakravarty (University of California, Los Angeles)

Talk Title:  “Quantum criticality: a frontier of theoretical physics”

Abstract:

In classical statistical mechanics critical phenomenon arises from thermal fluctuations whose explanation in its final form was provided by Kenneth G. Wilson nearly a century after its discovery. It is remarkable that at the absolute zero of temperature quantum fluctuations due to Heisenberg’s uncertainty principle can also give rise to criticality as a suitable non-thermal parameter is tuned. At these quantum critical points there are quantum fluctuations on all length scales, from microscopic to macroscopic lengths, which can be observed at finite temperatures, the regime to which all experiments are necessarily confined. Do quantum critical points provide a powerful framework for understanding of complex correlated many body problems? Do they shed new light on quantum mechanics of macroscopic systems, providing, for example, a deeper understanding of entanglement? In this talk I shall explore a broad swath of these questions and illustrate the ideas with experimental systems.

For more information, contact Jay Hauser

We thank the following people for their contributions to the wine fund for the post-colloquium reception:
Prof. Dolores Bozovic, Prof. Mike Cornwall, Prof. Bob Cousins, Prof. Andrea Ghez, Prof. Karoly Holczer, Prof. Eric Hudson, Robert Huff, Prof. Alex Kusenko, Prof. Myank Mehta, Prof. John Miao, Prof. Roberto Peccei, Prof. Claudio Pellegrini, Prof. David Saltzberg, Prof. Jean Turner and Prof. Ben Zuckerman.

Location: 
1-434 PAB