Quench dynamics of the Anderson impurity model at finite temperature using matrix product states: entanglement and bath dynamics

被引：19

作者：

Kohn, Lucas ^{[1
]}

Santoro, Giuseppe E. ^{[1
,2
,3
]}

机构：

[1] SISSA, Via Bonomea 265, I-1136 Trieste, Italy

[2] Abdus Salaam Int Ctr Theoret Phys, POB 586, I-34014 Trieste, Italy

[3] SISSA, Ist Officina Mat, Consiglio Nazl Ric, Via Bonomea 265, I-34136 Trieste, Italy

来源：

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2022年 / 2022卷 / 06期

关键词：

tensor network simulations; Anderson model; Kondo effect; quantum quenches; RENORMALIZATION-GROUP;

D O I：

10.1088/1742-5468/ac729b

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We study the dynamics of the quenched Anderson model at finite temperature using matrix product states (MPSs). Exploiting a chain mapping for the electron bath, we investigate the entanglement structure in the MPS for various orderings of the two chains, which emerge from the thermofield transformation employed to deal with nonzero temperature. We show that merging both chains can significantly lower the entanglement at finite temperatures as compared to an intuitive nearest-neighbor implementation of the Hamiltonian. Analyzing the population of the free bath modes-possible when simulating the full dynamics of impurity plus bath-we find clear signatures of the Kondo effect in the quench dynamics.

引用

页数：25

共 49 条

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