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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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- We study quantum fidelity, the overlap between two ground states of a many-body system, focusing on the thermodynamic regime.
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