Equilibration and thermalization of quantum many-body systems: A quantum information perspective

Speaker: 
Jens Eisert, Freie Universitaet Berlin, Germany
Event Date and Time: 
Tue, 2012-09-11 14:00 - 15:00
Location: 
Hennings 309B
Local Contact: 
Robert Raussendorf
Intended Audience: 
Graduate
Complex quantum systems out of equilibrium are at the basis of a number of the most intriguing puzzles in physics. This talk will be concerned with recent progress on understanding how quantum many-body systems out of equilibrium eventually come to rest. The first part of the talk will highlight theoretical progress on this question, taking in several ways a quantum information view - employing ideas of Lieb-Robinson bounds, quantum central limit theorems and of concentration of measure. These findings will be complemented by experimental work with ultra-cold atoms in optical lattices, constituting a dynamical "quantum simulator", allowing to probe physical questions that are presently out of reach for state-of-the-art numerical techniques based on matrix-product states, states generalizing the AKLT construction. We will also claim that such a device could solve problems that are presumably difficult to solve classically even with other techniques.
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