Emission and Absorption Quantum Noise Measurement with an On-Chip Resonant Circuit
Emission and Absorption Quantum Noise Measurement with an On-Chip Resonant Circuit
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. …