期刊
PHYSICAL REVIEW LETTERS
卷 118, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.103602
关键词
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资金
- German Research Foundation [SFB 631, FE 1564/1-1]
- EU
- doctorate program ExQM of the Elite Network of Bavaria
- International Max Planck Research School Quantum Science and Technology
In experiments with superconducting quantum circuits, characterizing the photon statistics of propagating microwave fields is a fundamental task. We quantify the n(2) + n photon number variance of thermal microwave photons emitted from a blackbody radiator for mean photon numbers, 0.05 less than or similar to n less than or similar to 1.5. We probe the fields using either correlation measurements or a transmon qubit coupled to a microwave resonator. Our experiments provide a precise quantitative characterization of weak microwave states and information on the noise emitted by a Josephson parametric amplifier.
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