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

• URL: http://arxiv.org/abs/2111.02321v1
• Date: Wed, 3 Nov 2021 16:13:26 GMT
• Title: Quench dynamics of two interacting atoms in a one-dimensional anharmonic trap
• Authors: I. S. Ishmukhamedov
• Abstract summary: A temporal response of two interacting particles to a quench of the coupling strength in one-dimensional harmonic and anharmonic traps is explored. The time evolution of the fidelity, wave packet, one-body reduced density matrix and momentum distributions is analyzed.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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, wave packet, 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 still could be identified. The quench dynamics of the ground and excited states are considered.

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