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Microwave controlled phase coherent transport in mesoscopic S-N-S structures

N. I. Lundin·L. Y. Gorelik·R. I. Shekhter·V. S. Shumeiko·M. Jonson
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Abstract

We show that transport through a superconducting quantum point contact biased at subgap voltages is strongly affected by a microwave field. The subgap current is increased by several orders of magnitude. Quantum interference among resonant scattering events involving photon absorption is reflected as an oscillating structure in the I-V curve. We also discuss how the same interference effect can be applied for detecting weak electromagnetic signals up to the gap frequency, and how it is affected by dephasing and relaxation.

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N. I. Lundin, L. Y. Gorelik, R. I. Shekhter, V. S. Shumeiko, M. Jonson. 1999-05-26. Microwave controlled phase coherent transport in mesoscopic S-N-S structures. https://arxiv.org/abs/cond-mat/9905386

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