Robust dynamical exchange cooling with trapped ions

We investigate theoretically the possibility for robust and fast cooling of a trapped atomic ion by transient interaction with a pre-cooled ion. The transient coupling is achieved through dynamical control of the ions' equilibrium positions. To achieve short cooling times we make use of shortcu...

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Bibliographic Details
Published in:New journal of physics 2020-07, Vol.22 (7), p.73069
Main Authors: Sägesser, T, Matt, R, Oswald, R, Home, J P
Format: Article
Language:English
Subjects:
Cooling
Coupling
ion cooling
Laser cooling
Offsets
Physics
quantum computation
Quantum computing
Robustness
shortcuts to adiabaticity
trapped ions
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Summary:We investigate theoretically the possibility for robust and fast cooling of a trapped atomic ion by transient interaction with a pre-cooled ion. The transient coupling is achieved through dynamical control of the ions' equilibrium positions. To achieve short cooling times we make use of shortcuts to adiabaticity by applying invariant-based engineering. We design these to take account of imperfections such as stray fields, and trap frequency offsets. For settings appropriate to a currently operational trap in our laboratory, we find that robust performance could be achieved down to 6.3 motional cycles, comprising 14.2 μs for ions with a 0.44 MHz trap frequency. This is considerably faster than can be achieved using laser cooling in the weak coupling regime, which makes this an attractive scheme in the context of quantum computing.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ab9e32