Quench dynamics of two interacting atoms in a one-dimensional anharmonic trap

被引：2

作者：

Ishmukhamedov, I. S. ^{[1
,2
,3
]}

机构：

[1] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, Russia

[2] Al Farabi Kazakh Natl Univ, Alma Ata 050040, Kazakhstan

[3] Minist Energy Republ Kazakhstan, Inst Nucl Phys, Alma Ata 050032, Kazakhstan

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2022年 / 142卷

关键词：

Quench dynamics; Anharmonic oscillator; Interatomic potentials; Nonequilibrium physics; Delocalization; Density-matrix; BOSONS;

D O I：

10.1016/j.physe.2022.115228

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A temporal response of two interacting particles to a quench of the coupling strength in one-dimensional harmonic and anharmonic traps is explored. The coupling strength is changed from repulsive to attractive interactions and vice versa. The time evolution of the fidelity, one-body reduced density matrix and momentum distributions is analyzed in details. It was found that impacts of the pre-and postquench states interchange during the dynamics. In the case of the anharmonic trap additional contribution of the center-of-mass excited states comes into play and the whole evolution becomes significantly altered. Yet the impact of the pre-and postquench states in some cases can still be identified. The quench dynamics of the ground and excited states are considered.

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页数：14

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