Loschmidt amplitude and work distribution in quenches of the sine-Gordon model

Article

关键词: CONE LATTICE APPROACH;    QUANTUM-FIELD-THEORY;    BETHE-ANSATZ;    BOUNDARY;    XXZ;    INTEGRABILITY;    DYNAMICS;    CHAINS;   

DOI  :  10.1103/PhysRevB.99.085133

来源: SCIE

【 摘 要 】

The sine-Gordon-equivalently, the massive Thirring-Hamiltonian is ubiquitous in low-dimensional physics, with applications that range from cold atom and strongly correlated systems to quantum impurities. We study here its nonequilibrium dynamics using the quantum quench protocol-following the system as it evolves under the sine-Gordon Hamiltonian from initial Mott-type states with large potential barriers. By means of the Bethe ansatz, we calculate exactly the Loschmidt amplitude, the fidelity, and work distribution characterizing these quenches for different values of the interaction strength. Some universal features are noted as well as an interesting duality relating quenches in different parameter regimes of the model.

【 授权许可】

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