TY - JOUR
T1 - Subharmonic pumping of a Josephson-parametric amplifier and the pitchfork instability
AU - Movshovich, R.
AU - Yurke, B.
AU - Smith, A. D.
AU - Silver, A. H.
PY - 1991
Y1 - 1991
N2 - We report the observation of substantial amplification due to multiwave (more than four) mixing in a Josephson-parametric amplifier. Amplification was achieved with subharmonic pumping at 2/3, 2/5, and 2/7 of the signal frequency near 19 GHz. The processes reponsible for the amplification were, correspondingly, five-, seven-, and nine-wave mixing. For the case of five-wave mixing we have observed amplification in excess of 35 dB and noise referred to input of a few degrees kelvin before the amplifier undergoes a pitchfork instability. The noise rise at the pitchfork bifurcation was also studied and compared with theory.
AB - We report the observation of substantial amplification due to multiwave (more than four) mixing in a Josephson-parametric amplifier. Amplification was achieved with subharmonic pumping at 2/3, 2/5, and 2/7 of the signal frequency near 19 GHz. The processes reponsible for the amplification were, correspondingly, five-, seven-, and nine-wave mixing. For the case of five-wave mixing we have observed amplification in excess of 35 dB and noise referred to input of a few degrees kelvin before the amplifier undergoes a pitchfork instability. The noise rise at the pitchfork bifurcation was also studied and compared with theory.
UR - https://www.scopus.com/pages/publications/12044259522
U2 - 10.1103/PhysRevLett.67.1411
DO - 10.1103/PhysRevLett.67.1411
M3 - Article
AN - SCOPUS:12044259522
SN - 0031-9007
VL - 67
SP - 1411
EP - 1414
JO - Physical Review Letters
JF - Physical Review Letters
IS - 11
ER -