Year: 2007
Type: article
Abstract: Motivated by the growing importance of fidelity in quantum critical phenomena, we establish a general relation between the fidelity and structure factor of the driving term in a Hamiltonian through the concept of 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.
Source: Physical Review E
Authors: Wen-Long You, Ying-Wai Li, Shi-Jian Gu
Institutions: Chinese University of Hong Kong, Peking University
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Chinese University of Hong Kong
OpenAlex ID: W2075915811