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arxiv: cond-mat/0212414 · v3 · submitted 2002-12-17 · ❄️ cond-mat.mes-hall · cond-mat.supr-con

Decoherence in a Cooper pair shuttle

classification ❄️ cond-mat.mes-hall cond-mat.supr-con
keywords currentcooperdecoherencejosephsonpairshuttlechangecoupling
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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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