Down-conversion of quantum fluctuations of photonic heat current in a circuit
arXiv:2104.09238 · doi:10.1103/PhysRevB.104.165418
Abstract
We discuss the non-zero frequency noise of heat current with the explicit example of energy carried by thermal photons in a circuit. Instead of the standard circuit modelling that gives a convenient way of predicting time-averaged heat current, we describe a setup composed of two resistors forming the heat baths by collections of bosonic oscillators. In terms of average heat transport this model leads to identical results with the conventional one, but besides this, it yields a convenient way of dealing with noise as well. The non-zero frequency heat current noise does not vanish in equilibrium even at zero temperature, the result that is known for, e.g., electron tunneling. We present a modulation method that can convert the difficult-to-measure high frequency quantum noise down to zero frequency.
References in corpus (14)
- Single-mode heat conduction by photons
- On the heat flux and entropy produced by thermal fluctuations
- Electronic Refrigeration at the Quantum Limit
- Anomalous Thermal Transport in Quantum Wires
- Violation of the fluctuation-dissipation theorem in time-dependent mesoscopic heat transport
- Circuit approach to photonic heat transport
- Energy transport and fluctuations in small conductors
- Electronic Heat Transport Across a Molecular Wire: Power Spectrum of Heat Fluctuations
- Photonic heat transport across a Josephson junction
- Quantum noise of electron-phonon heat current
- Statistics of heat exchange between two resistors
- Divergence at low bias and down-mixing of the current noise in a diffusive superconductor-normal metal-superconductor junction
- Electronic heat current fluctuations in a quantum dot
- An exactly solvable model of calorimetric measurements