Antibunched Photons Emitted by a dc-Biased Josephson Junction

We show experimentally that a dc biased Josephson junction in series with a high-enough-impedance microwave resonator emits antibunched photons. Our resonator is made of a simple microfabricated spiral coil that resonates at 4.4 GHz and reaches a 1.97  kΩ characteristic impedance. The second order c...

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Bibliographic Details
Published in:Physical review letters 2019-05, Vol.122 (18), p.186804-186804, Article 186804
Main Authors: Rolland, C, Peugeot, A, Dambach, S, Westig, M, Kubala, B, Mukharsky, Y, Altimiras, C, le Sueur, H, Joyez, P, Vion, D, Roche, P, Esteve, D, Ankerhold, J, Portier, F
Format: Article
Language:English
Subjects:
Coils
Condensed Matter
Impedance
Josephson junctions
Mesoscopic Systems and Quantum Hall Effect
Photons
Physics
Resonators
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Summary:We show experimentally that a dc biased Josephson junction in series with a high-enough-impedance microwave resonator emits antibunched photons. Our resonator is made of a simple microfabricated spiral coil that resonates at 4.4 GHz and reaches a 1.97  kΩ characteristic impedance. The second order correlation function of the power leaking out of the resonator drops down to 0.3 at zero delay, which demonstrates the antibunching of the photons emitted by the circuit at a rate of 6×10^{7} photons per second. Results are found in quantitative agreement with our theoretical predictions. This simple scheme could offer an efficient and bright single-photon source in the microwave domain.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.122.186804