Decay of the supercurrent in tunnel junctions
A. I. LarkinLandau Institute for Theoretical Physics, Academy of Sciences of the Union of the Soviet Socialist Republic, 117940 Moscow, Union of the Soviet Socialist RepublicYu. N. OvchinnikovLandau Institute for Theoretical Physics, Academy of Sciences of the Union of the Soviet Socialist Republic, 117940 Moscow, Union of the Soviet Socialist Republic
1983en
ABI
Abstract
The current state in a Josephson junction is metastable. Thermal and quantum fluctuations destroy such a state and make its lifetime finite. By lowering the temperature the role of quantum fluctuations increases. If there is a gap in the excitation spectrum, then for quantum tunneling high-frequency processes (pair decay) are essential. Quantum tunneling is connected with a change of a large amount of electron states.
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Cited by 20 references