Published June 30, 2014 | Version v1
Journal article Metadata-only

Strong environmental coupling in a Josephson parametric amplifier

Creators

  • 1. Department of Physics, University of California, Santa Barbara, California 93106-9530 (United States)
  • 2. Department of Materials, University of California, Santa Barbara, California 93106 (United States)
  • 3. Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States)

Description

We present a lumped-element Josephson parametric amplifier designed to operate with strong coupling to the environment. In this regime, we observe broadband frequency dependent amplification with multi-peaked gain profiles. We account for this behavior using the "pumpistor" model which allows for frequency dependent variation of the external impedance. Using this understanding, we demonstrate control over the complexity of gain profiles through added variation in the environment impedance at a given frequency. With strong coupling to a suitable external impedance, we observe a significant increase in dynamic range, and large amplification bandwidth up to 700 MHz giving near quantum-limited performance.

Additional details

Identifiers

DOI
10.1063/1.4886408;
arXiv
arXiv:1401.3799v2;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
104
Journal Issue
26
Journal Page Range
p. 263513-263513.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46010087
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
CONTROL; COUPLING; FREQUENCY DEPENDENCE; GAIN; IMPEDANCE; MHZ RANGE; PARAMETRIC AMPLIFIERS; STRONG-COUPLING MODEL
Descriptors DEC
AMPLIFICATION; AMPLIFIERS; ELECTRONIC EQUIPMENT; EQUIPMENT; FREQUENCY RANGE; MATHEMATICAL MODELS; PARTICLE MODELS

Optional Information

Notes
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