A widely tunable parametric amplifier based on a SQUID array resonator

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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.
9 pages, 4 figures, submitted to Applied Physics Letters

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Superconductivity, Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/174126

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0706.2373
 http://arxiv.org/abs/0706.2373
 Widely tunable parametric amplifier based on a superconducting quantum interference device array resonator M. A. Castellanos-Beltran and K. W. Lehnert, Appl. Phys. Lett. 91, 083509 (2007)
 doi:10.1063/1.2773988

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arXiv