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Fidelity, dynamic structure factor, and susceptibility in critical phenomena

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arxiv quant-ph/0701077 v2 pith:H4THOVB2 submitted 2007-01-12 quant-ph

classification quant-ph
keywords fidelitysusceptibilitycriticalfactorphenomenastructurecarloconcept
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Motivated by the growing importance of fidelity in quantum critical phenomena, we establish a general relation between fidelity and structure factor of the driving term in a Hamiltonian through a newly introduced concept: fidelity susceptibility. Our discovery, as shown by some examples, facilitates the evaluation of fidelity in terms of susceptibility using well developed techniques such as density matrix renormalization group for the ground state, or Monte Carlo simulations for the states in thermal equilibrium.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Effects of the Hubbard interaction on the quantum metric

    cond-mat.str-el 2024-12 conditional novelty 6.0 of 10

    On a fermionic Creutz ladder, the dressed quantum metric matches exact diagonalization results better than the generalized quantum metric, and Hubbard interactions suppress the quantum metric.

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