Dynamics of adiabatic Andreev levels in microwave-irradiated superconducting single-mode contacts
N. I. Lundin
DOI 10.1103/PhysRevB.61.9101 · Physical Review B
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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 field induces Landau-Zener transitions between current carrying Andreev states and the subgap current is increased by several orders of magnitude. The current exhibits an oscillating structure which has its origin in interference among the resonant transitions. We present a systematic study of the current through the contact, varying the strength and frequency of the applied microwave field and the applied bias.
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