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Quantum Thermodynamics

Quantum fidelity in the thermodynamic limit

arXiv
Authors: Marek M. Rams, Bogdan Damski

Year

2010

Paper ID

10988

Status

Preprint

Abstract Read

~2 min

Abstract Words

58

Citations

N/A

Abstract

We study quantum fidelity, the overlap between two ground states of a many-body system, focusing on the thermodynamic regime. We show how drop of fidelity near a critical point encodes universal information about a quantum phase transition. Our general scaling results are illustrated in the quantum Ising chain for which a remarkably simple expression for fidelity is found.

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  • This paper contributes to the Quantum Thermodynamics research area in the Quantum Articles archive.
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  • We study quantum fidelity, the overlap between two ground states of a many-body system, focusing on the thermodynamic regime.

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