Observation of 4.2 equilibrium noise squeezing via a Josephson-parametric amplifier

Author

Yurke, B. ; Kaminsky, P.G. ; Miller, R.E. ; Whittaker, E.A. ; Smith, A.D. ; Silver, A.H. ; Simon, R.W.

Author_Institution

AT&T Bell Lab., Murray Hill, NJ, USA

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1371

Lastpage

1375

Abstract

The authors observed the squeezing of 4.2 K thermal noise using a Josephson parametric amplifier operated in the degenerate mode at 19.4 GHz. A 42% reduction in the equilibrium noise was observed. The amplifier has also been operated at 0.1 K with an excess noise of 0.28 K referred to the amplifier´s input port. This is less than the vacuum fluctuation noise of 0.47 K at the amplifier´s input. Recently the amplifier has been operated in a nonchaotic mode with a signal gain in excess of 16 dB

Keywords

Josephson effect; electron device noise; microwave parametric amplifiers; solid-state microwave circuits; superconducting junction devices; thermal noise; 0.1 to 4.2 K; 16 dB; 19.4 GHz; Josephson-parametric amplifier; SHF; degenerate mode; equilibrium noise squeezing; nonchaotic mode; superconducting junction device; thermal noise; Fluctuations; Frequency; Noise generators; Noise level; Noise reduction; Optical amplifiers; Optical interferometry; Optical noise; Space technology; Spectroscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92550

Filename

92550