Cryogenic microwave source based on nanoscale tunnel junctions
arXiv:1612.06822
Abstract
We experimentally realize an incoherent microwave source driven by voltage-controlled quantum tunneling of electrons through nanoscale normal-metal--insulator--superconductor junctions coupled to a resonator. We observe the direct conversion of the electronic energy into microwave photons by measuring the power spectrum of the microwave radiation emitted from the resonator. The demonstrated total output power exceeds that of 2.5-K thermal radiation although the photon and electron reservoirs are at subkelvin temperatures. Measurements of the output power quantitatively agree with a theoretical model in a wide range of the bias voltages providing information on the electrically-controlled photon creation. The developed photon source is fully compatible with low-temperature electronics and offers convenient in-situ electrical control of the photon emission rate with a predetermined frequency, without relying on intrinsic voltage fluctuations of heated normal-metal components nor suffering from unwanted dissipation in room temperature cables. In addition to its potential applications in microwave photonics, our results provide complementary verification of the working principles of the recently discovered quantum-circuit refrigerator.
References in corpus (20)
- Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
- Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
- Coupling Superconducting Qubits via a Cavity Bus
- State preservation by repetitive error detection in a superconducting quantum circuit
- Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
- Generating Single Microwave Photons in a Circuit
- Single-mode heat conduction by photons
- Mesoscopic Cavity Quantum Electrodynamics with Quantum Dots
- Photon assisted tunneling as an origin of the Dynes density of states
- The Bright Side of Coulomb Blockade
- Photon Emission from a Cavity-Coupled Double Quantum Dot
- Quantum Circuit Refrigerator
- Single-qubit lasing and cooling at the Rabi frequency
- Tuneable on-demand single-photon source
- Detection of zeptojoule microwave pulses using electrothermal feedback in proximity-induced Josephson junctions
- Electronic Refrigeration at the Quantum Limit
- Persistent single-photon production by tunable on-chip micromaser with a superconducting quantum circuit
- Microwave Emission from Hybridized States in a Semiconductor Charge Qubit
- Dispersive thermometry with a Josephson junction coupled to a resonator
- Experimental determination of the statistics of photons emitted by a tunnel junction