Superconductor-Metal Transition in an Ultrasmall Josephson Junction Biased by a Noisy Voltage Source
E. B. Sonin
DOI 10.1103/PhysRevLett.98.030601 · Physical Review Letters
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Abstract
Shot noise in a voltage source changes the character of the quantum (dissipative) phase transition in an ultrasmall Josephson junction: The superconductor-insulator transition transforms into the superconductor-metal transition. In the metallic phase, the IV curve probes the voltage distribution generated by shot noise, whereas in the superconducting phase, it probes the counting statistics of electrons traversing the noise junction.
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