Macroscopic Resonant Tunneling in the Presence of Low Frequency Noise

Details Macroscopic Resonant Tunneling in the Presence of Low Frequency Noise Macroscopic Resonant Tunneling in the Presence of Low Frequency Noise

2007-12-05

arxiv.org/abs/0712.0845v2

Phys. Rev. Lett. 100, 197001 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.100.197001

We develop a theory of macroscopic resonant tunneling of flux in a double-well potential in the presence of realistic flux noise with significant low-frequency component. The rate of incoherent flux tunneling between the wells exhibits resonant peaks, the shape and position of which reflect qualitative features of the noise, and can thus serve as a diagnostic tool for studying the low-frequency flux noise in SQUID qubits. We show, in particular, that the noise-induced renormalization of the first resonant peak provides direct information on the temperature of the noise source and the strength of its quantum component.

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