Controlling decoherence speed limit of a single impurity atom in a Bose-Einstein-condensate reservoir

TL;DR

This paper investigates how the decoherence speed limit of a single impurity atom in a Bose-Einstein condensate can be controlled by engineering the reservoir and potential parameters, revealing underlying physical mechanisms.

Contribution

It demonstrates the ability to manipulate the decoherence speed limit through reservoir and potential engineering within realistic experimental conditions.

Findings

Decoherence speed limit can be tuned by changing condensate scattering length.

Effective dimension of the BEC reservoir influences the DSL.

Spatial configuration of the double-well affects decoherence control.

Abstract

We study the decoherence speed limit (DSL) of a single impurity atom immersed in a Bose-Einsteincondensed (BEC) reservoir when the impurity atom is in a double-well potential. We demonstrate how the DSL of the impurity atom can be manipulated by engineering the BEC reservoir and the impurity potential within experimentally realistic limits. We show that the DSL can be controlled by changing key parameters such as the condensate scattering length, the effective dimension of the BEC reservoir, and the spatial configuration of the double-well potential imposed on the impurity. We uncover the physical mechanisms of controlling the DSL at root of the spectral density of the BEC reservoir.