Cooling through Optimal Control of Quantum Evolution

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Cooling through Optimal Control of Quantum Evolution

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Title: Cooling through Optimal Control of Quantum Evolution
Author: Rahmani, Armin; Kitagawa, Takuya; Demler, Eugene A.; Chamon, Claudio

Note: Order does not necessarily reflect citation order of authors.

Citation: Rahmani, Armin, Takuya Kitagawa, Eugene Demler, and Claudio Chamon. 2013. Cooling through Optimal Control of Quantum Evolution. Physical Review A 87, no. 4: 043607. doi:10.1103/PhysRevA.87.043607
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Abstract: Nonadiabatic unitary evolution with tailored time-dependent Hamiltonians can prepare systems of cold-atomic gases with various desired properties such as low excess energies. For a system of two one-dimensional quasicondensates coupled with a time-varying tunneling amplitude, we show that the optimal protocol, for maximizing any figure of merit in a given time, is bang-bang, i.e., the coupling alternates between only two values through a sequence of sudden quenches. Minimizing the energy of one of the quasicondensates with such a nonadiabatic protocol, and then decoupling it at the end of the process, can result in effective cooling beyond the current state of the art. Our cooling method can be potentially applied to arbitrary systems through an integration of the experiment with simulated annealing computations.
Published Version: doi:10.1103/PhysRevA.87.043607
Other Sources: http://arxiv.org/pdf/1210.5244v2.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:34305978
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