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Department of Atomic Energy, Govt. of India
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Past Seminar

Title              :

Quantum phase transition and quantum fidelity

Speaker         : Amit Dutta, IIT Kanpur
Date                : August 22, 2014
Time               : 2:30 PM
Venue            : Lecture Hall II
Abstract        :

Finite size scaling is an important tool to study the \"critical behavior\" of a finite system. On the other hand, quantum fidelity is a quantum information theoretic measure that can efficiently detect a quantum critical point for a finite quantum system. In this talk, I shall show that the scaling of fidelity in different limits can be derived in a straightforward fashion simply using the notion of the finite size scaling analyzing different length scales involved in the problem. I shall also indicate situations (known as the \"marginal situation\") where the fidelity approach fails to detect a quantum critical point.

 

 

Last Updated on Friday, 11 April 2014 18:51
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