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Quantum phase slip noise
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DOI：10.1103/PhysRevB.94.014512.png)
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摘要
En 中文
Quantum phase slips (QPSs) generate voltage fluctuations in superconducting nanowires. Employing the Keldysh technique and making use of the phase-charge duality arguments, we develop a theory of QPS-induced voltage noise in such nanowires. We demonstrate that quantum tunneling of the magnetic flux quanta across the wire yields quantum shot noise which obeys Poisson statistics and is characterized by a power-law dependence of its spectrum S-Omega on the external bias. In long wires, S-Omega decreases with increasing frequency Omega and vanishes beyond a threshold value of Omega at T -> 0. The quantum coherent nature of QPS noise yields nonmonotonous dependence of S-Omega on T at small Omega.
Keyword:
SMALL TUNNEL-JUNCTIONS
DYNAMICS
SUPERCONDUCTIVITY
NANOWIRES
CHARGE
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期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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