Single Cooper pair tunneling induced by non-classical microwaves

Details Single Cooper pair tunneling induced by non-classical microwaves Single Cooper pair tunneling induced by non-classical microwaves

1996-01-04

arxiv.org/abs/cond-mat/9601011v1

Physics

Condensed Matter

8 pages, 2 figures are available upon request to: odintsov@duttntn.tn.tudelft.nl

Scientific paper

10.1209/epl/i1996-00468-4

A mesoscopic Josephson junction interacting with a mode of non-classical microwaves with frequency $\omega$ is considered. Squeezing of the electromagnetic field drastically affects the dynamics of Cooper tunneling. In particular, Bloch steps can be observed even when the microwaves are in the squeezed vacuum state with {\em zero} average amplitude of the field $\langle E(t) \rangle = 0$. The interval between these steps is double in size in comparison to the conventional Bloch steps.

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