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arXiv · 1402.7084

Local quenches with global effects in interacting quantum systems

E. J. Torres-Herrera·Lea F. Santos
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Abstract

We study one-dimensional lattices of interacting spins-1/2 and show that the effects of quenching the amplitude of a local magnetic field applied to a single site of the lattice can be comparable to the effects of a global perturbation applied instantaneously to the entire system. Both quenches take the system to the chaotic domain, the energy distribution of the initial states approaches a Breit-Wigner shape, the fidelity (Loschmidt echo) decays exponentially, and thermalization becomes viable.

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BibTeXRIS

E. J. Torres-Herrera, Lea F. Santos. 2014-09-04. Local quenches with global effects in interacting quantum systems. https://doi.org/10.1103/physreve.89.062110

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