期刊
PHYSICAL REVIEW B
卷 87, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.041109
关键词
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资金
- Hungarian Scientific Research Funds [K72613, K73361, K101244, CNK80991, TAMOP-4.2.1/B-09/1/KMR-2010-0002]
- ERC [ERC-259374-Sylo]
We study variable-rate linear quenches in the anisotropic Heisenberg (XXZ) chain, starting at the XX point. This is equivalent to switching on a nearest-neighbor interaction for hard-core bosons or an interaction quench for free fermions. The physical observables we investigate are the energy pumped into the system during the quench, the spin-flip correlation function, and the bipartite fluctuations of the z component of the spin in a box. We find excellent agreement between exact numerics (infinite system time-evolving block decimation) and analytical results from bosonization, as a function of the quench time, spatial coordinate, and interaction strength. This provides a stringent and much-needed test of Luttinger liquid theory in a nonequilibrium situation. DOI: 10.1103/PhysRevB.87.041109
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