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. 2002 May 3;296(5569):889-92.
doi: 10.1126/science.1069452.

Coherent temporal oscillations of macroscopic quantum states in a Josephson junction

Yang Yu  1 , Siyuan Han, Xi Chu, Shih-I Chu, Zhen Wang
Affiliations

Coherent temporal oscillations of macroscopic quantum states in a Josephson junction

Yang Yu et al. Science. .

Abstract

We report the generation and observation of coherent temporal oscillations between the macroscopic quantum states of a Josephson tunnel junction by applying microwaves with frequencies close to the level separation. Coherent temporal oscillations of excited state populations were observed by monitoring the junction's tunneling probability as a function of time. From the data, the lower limit of phase decoherence time was estimated to be about 5 microseconds.

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