Controlling decoherence speed limit of a single impurity atom in a Bose-Einstein-condensate reservoir
arXiv:1809.10810 · doi:10.1002/andp.201800423
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.
8 pages, 8 figures
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- Imaging the interface of a qubit and its quantum-many-body environment
- Quantum information flow in impurity qubits interacting with Bose-Bose mixtures
- Complementarity between micro-micro and micro-macro entanglement in a Bose-Einstein condensate with two Rydberg impurities
- Controlling quantum coherence of a two-component Bose-Einstein condensate via an impurity atom
- Witnessing entanglement via the geometric phase in a impurity-doped Bose-Einstein condensate