A bright on-demand source of anti-bunched microwave photons based on inelastic Cooper pair tunneling

Abstract

The ability to generate single photons is not only an ubiquitous tool for scientific exploration with applications ranging from spectroscopy and metrology to quantum computing, but also an important proof of the underlying quantum nature of a physical process. In the microwave regime, emission of anti-bunched radiation has so far relied on coherent control of Josephson qubits, where precisely calibrated microwave pulses are needed, and the achievable bandwidth is limited by the anharmonicity of the qubit. Here, we demonstrate the operation of a bright on-demand source of quantum microwave radiation capable of emitting anti-bunched photons based on inelastic Cooper pair tunneling and driven by a simple DC voltage bias. It is characterized by its normalized second order correlation function of $g^{(2)}(0)\approx 0.43$ corresponding to anti-bunching in the single photon regime. Our source can be triggered and its emission rate is tunable in situ exceeding rates obtained with current microwave single photon sources by more than one order of magnitude.

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Cited by in corpus (19)

• Antibunched photons emitted by a dc biased Josephson junction
• Absence of a dissipative quantum phase transition in Josephson junctions
• Generating two continuous entangled microwave beams using a dc-biased Josephson junction
• Emission of photon multiplets by a dc-biased superconducting circuit
• Single-photon emission mediated by single-electron tunneling in plasmonic nanojunctions
• Anomalous Andreev Spectrum and Transport in Non-Hermitian Josephson Junctions
• Injection locking and synchronization in Josephson photonics devices
• A compact and tunable forward coupler based on high-impedance superconducting nanowires
• Photon-pair blockade in a Josephson-photonics circuit with two nondegenerate microwave resonators
• Theory of double Cooper-pair tunneling and light emission mediated by a resonator
• Analysis of a single-mode waveguide at sub-terahertz frequencies as a communication channel
• Radiation statistics of a degenerate parametric oscillator at threshold
• Generation of time-frequency entangled photon pairs propagating in separate waveguides in circuit QED setup
• The superconducting clock-circuit: Improving the coherence of Josephson radiation beyond the thermodynamic uncertainty relation
• Josephson Photonics with Simultaneous Resonances
• Tunable Josephson voltage source for quantum circuits
• Testing Kubo formula on a nonlinear quantum conductor driven far from equilibrium via power exchanges
• Stroboscopic detection of itinerant microwave photons
• Free-space sub-terahertz field-polarization controlled by waveguide-mode-selection