A widely tunable parametric amplifier based on a SQUID array resonator

Details A widely tunable parametric amplifier based on a SQUID array resonator A widely tunable parametric amplifier based on a SQUID array resonator

2007-06-15

arxiv.org/abs/0706.2373v1

Widely tunable parametric amplifier based on a superconducting quantum interference device array resonator M. A. Castellanos-B

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures, submitted to Applied Physics Letters

Scientific paper

10.1063/1.2773988

We create a Josephson parametric amplifier from a transmission line resonator whose inner conductor is made from a series SQUID array. By changing the magnetic flux through the SQUID loops, we are able to adjust the circuit's resonance frequency and, consenquently, the center of the amplified band, between 4 and 7.8 GHz. We observe that the amplifier has gains as large as 28 dB and infer that it adds less than twice the input vacuum noise.

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