Vacuum noise squeezing at microwave frequencies using a Josephson parametric amplifier

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6047760

Movshovich, R; Yurke, B; Kaminsky, P G ^[1]; Smith, A D; Silver, A H; Simon, R W ^[2]

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1. AT and T Bell Labs., Murray Hill, NJ (United States)
2. TRW Space and Technology Group, Redondo Beach, CA (United States)

This paper reports on experiments on generating squeezed microwave radiation at 19.16 GHz using a Josephson Parametric Amplifier. The source of the radiation was cooled by a dilution refrigerator down to the lowest temperature of .030K. At this temperature noise at the input port of the parametric amplifier consists almost entirely of the vacuum fluctuations with a noise temperature hv/2k of 0.46K. We have observed the squeezing of the microwave noise by 47 {plus minus} 8% as referred to the input of the Josephson Parametric Amplifier. The measured double-sideband noise temperature of the amplifier is 0.446K, which is comparable to the vacuum noise level.

• OSTI ID: 6047760
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLIFIERS
DATA
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
INFORMATION
JOSEPHSON JUNCTIONS
JUNCTIONS
MICROWAVE RADIATION
NOISE
NUMERICAL DATA
PARAMETRIC AMPLIFIERS
PERFORMANCE TESTING
RADIATIONS
SUPERCONDUCTING JUNCTIONS
TEMPERATURE NOISE
TESTING