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Decoherence in a Cooper pair shuttle

Alessandro Romito·Francesco Plastina·Rosario Fazio
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Abstract

We examine decoherence effects in the Josephson current of a Cooper pair shuttle. Dephasing due to gate voltage fluctuations can either suppress or enhance the critical current and also change its sign. The current noise spectrum displays a peak at the Josephson coupling energy and shows a phase dependence.

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Alessandro Romito, Francesco Plastina, Rosario Fazio. 2009-01-20. Decoherence in a Cooper pair shuttle. https://doi.org/10.1103/physrevb.68.140502

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