Emission and Absorption quantum noise measurement with an on-chip resonant circuit
arXiv:1006.0892 · doi:10.1103/PhysRevLett.105.166801
Abstract
Using a quantum detector, a superconductor-insulator-superconductor junction, we probe separately the emission and absorption noise in the quantum regime of a superconducting resonant circuit at equilibrium. At low temperature the resonant circuit exhibits only absorption noise related to zero point fluctuations whereas at higher temperature emission noise is also present. By coupling a Josephson junction, biased above the superconducting gap, to the same resonant circuit, we directly measure the noise power of quasiparticles tunneling through the junction at two resonance frequencies. It exhibits a strong frequency dependence, consistent with theoretical predictions.
5 pages, 4 figures
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Cited by in corpus (60)
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