Abstract
We study the decoherence of a superposition of four coherent states under the action of a phase sensitive reservoir. We verify that the decoherence times τ k,l, k,l=1,2,3,4, between any two coherent states of the superposition can be controlled through the reservoir parameters. The decoherence time between two components of any pair, for instance τ 1,2 or τ 3,4, can be significantly increased, compared with the decoherence time when the state is acted by a thermal reservoir. However, this occurs at the expense of decreasing the decoherence time between the ``cat states" (1,2) and (3,4). This can be useful in quantum computation.
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de Souza Silva, A.L., Mizrahi, S.S. & Dodonov, V.V. Effect of Phase-Sensitive Reservoir on the Decoherence of Pair-Cat Coherent States. Journal of Russian Laser Research 22, 534–544 (2001). https://doi.org/10.1023/A:1012962216106
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DOI: https://doi.org/10.1023/A:1012962216106