Dynamics of a trapped ion in a quantum gas: effects of particle statistics

We study the quantum dynamics of an ion confined in a radiofrequency trap in interaction with either a Bose or spin-polarized Fermi gas. To this end, we derive quantum optical master equations in the limit of weak coupling and the Lamb-Dicke approximations. For the bosonic bath, we also include the...

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Bibliographic Details
Published in:arXiv.org 2021-11
Main Authors: Oghittu, Lorenzo, Johannsen, Melf, Gerritsma, Rene, Negretti, Antonio
Format: Article
Language:English
Subjects:
Coupling
Damping
Fermi gases
Gas temperature
Ion motion
Ion scattering
Kinetic energy
Quantum statistics
Radio frequency
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Summary:We study the quantum dynamics of an ion confined in a radiofrequency trap in interaction with either a Bose or spin-polarized Fermi gas. To this end, we derive quantum optical master equations in the limit of weak coupling and the Lamb-Dicke approximations. For the bosonic bath, we also include the so-called "Lamb-shift" correction to the ion trap due to the coupling to the quantum gas as well as the extended Fr\"ohlich interaction within the Bogolyubov approximation that have been not considered in previous studies. We calculate the ion kinetic energy for various atom-ion scattering lengths as well as gas temperatures by considering the intrinsic micromotion and we analyse the damping of the ion motion in the gas as a function of the gas temperature. We find that the ion's dynamics depends on the quantum statistics of the gas and that a fermionic bath enables to attain lower ionic energies.
ISSN:2331-8422
DOI:10.48550/arxiv.2109.03143