Influence of bias-voltage noise on the inelastic cooper-pair tunneling amplifier (ICTA)
Abstract
We experimentally show that the inelastic cooper-pair tunneling amplifier (ICTA), implementing a DC-powered parametric amplification scheme, can achieve gain and noise performance similar to that of AC-powered Josephson parametric amplifiers. Using experimental data and simulations, we show that the ICTA has near-quantum-limited noise as long as low-frequency voltage noise, expressed as broadening of the Josephson frequency line, is narrower than the amplification bandwidth. We observe a gain of 20 dB across a 11 MHz bandwidth with noise below 1.7 times the quantum limit when the full width at half maximum of the Josephson frequency linewidth is 5.6 MHz.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (10)
U. Martel
Institut Quantique, Université de Sherbrooke 1 , Sherbrooke, Québec J1K 2R1,
R. Albert
University Grenoble Alpes, CEA, INAC-PHELIQS 2 , F-38000 Grenoble,
F. Blanchet
University Grenoble Alpes, CEA, INAC-PHELIQS 2 , F-38000 Grenoble,
J. Griesmar
G. Ouellet
Institut Quantique, Université de Sherbrooke 1 , Sherbrooke, Québec J1K 2R1,
H. Therrien
Institut Quantique, Université de Sherbrooke 1 , Sherbrooke, Québec J1K 2R1,
N. Nehra
Institut Quantique, Université de Sherbrooke 1 , Sherbrooke, Québec J1K 2R1,
N. Bourlet
Institut Quantique, Université de Sherbrooke 1 , Sherbrooke, Québec J1K 2R1,
A. Peugeot
M. Hofheinz
Institut Quantique, Université de Sherbrooke 1 , Sherbrooke, Québec J1K 2R1,