Quantum decay of supercurrent in thin superconducting wires |
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Authors: | Andrei D Zaikin Dmitrii S Golubev Anne van Otterlo Gergely T Zimanyi |
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Institution: | 1.Institut für Theoretische Festk?rperphysik,Universit?t Karlsruhe,Karlsruhe,Germany;2.P. N. Lebedev Physics Institute,Moscow,Russia;3.Theoretische Physik,ETH-H?nggerberg,Zürich,Switzerland;4.Physics Department,University of California,Davis,USA |
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Abstract: | Quantum fluctuations cause a decay of the supercurrent in thin superconducting wires making them resistive even at very low temperatures. We derive a microscopic effective action formalism that goes beyond the usual TDGL approach and study quantum fluctuations of the superconducting order parameter at all temperatures belowT C . We calculate the quantum phase slip rate in thin superconducting wires, demonstrate the importance of dissipation in a quantum phase slip process, and evaluate the resistanceR(T) of the wire. In very thin wires the effect is well observable, even at zero temperature. |
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