Quantum Institute: Visitor Schedule

The Quantum Lunch is regularly held on Thursdays in the Theoretical Division Conference Room, TA-3, Building 123, Room 121.
For more information, contact Diego Dalvit.

November 9, 2006
12:30 PM

Paul Berman,
University of Michigan

Collective Excitations and Spin Squeezing in Simple Quantum Systems

Abstract

Entangled states play a critical role in quantum information. Some basic properties of entangled states are reviewed and it is shown that certain atom-field interactions described in terms of entangled states do not necessarily involve entangled states at all. Methods for generating entangled states using a van der Waals blockade are discussed along with experimental evidence for the creation of these states. Properties of spin squeezed states, that are necessarily entangled states, are also reviewed. The production of spin squeezed states using atom-cavity field interactions or by post selection, using Faraday rotation or four-wave mixing, will be discussed.