Abstract
We have demonstrated (47±8)% squeezing of vacuum-fluctuation noise using a Josephson-parametric amplifier operated at 19.16 GHz. The amplifier was operated at 30 mK and has a double-sideband noise temperature of 0.446 K. This is comparable to the vacuum noise floor h/2k=0.460 K.
Original language | English |
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Pages (from-to) | 1419-1422 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 65 |
Issue number | 12 |
DOIs | |
State | Published - 1990 |
Externally published | Yes |