Models of reduced-noise, probabilistic linear amplifiers

Combes, Joshua, Walk, Nathan, Lund, A. P., Ralph, T. C. and Caves, Carlton M. (2016) Models of reduced-noise, probabilistic linear amplifiers. Physical Review A - Atomic, Molecular, and Optical Physics, 93 5: 052310.1-052310.12. doi:10.1103/PhysRevA.93.052310

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Author Combes, Joshua
Walk, Nathan
Lund, A. P.
Ralph, T. C.
Caves, Carlton M.
Title Models of reduced-noise, probabilistic linear amplifiers
Journal name Physical Review A - Atomic, Molecular, and Optical Physics   Check publisher's open access policy
ISSN 1094-1622
1050-2947
1538-4446
Publication date 2016-05-05
Year available 2016
Sub-type Article (original research)
DOI 10.1103/PhysRevA.93.052310
Open Access Status File (Publisher version)
Volume 93
Issue 5
Start page 052310.1
End page 052310.12
Total pages 12
Place of publication College Park, United States
Publisher American Physical Society
Language eng
Abstract We construct an amplifier that interpolates between a nondeterministic, immaculate linear amplifier and a deterministic, ideal linear amplifier and beyond to nonideal linear amplifiers. The construction involves cascading an immaculate linear amplifier that has amplitude gain g(1) with a (possibly) nonideal linear amplifier that has gain g(2). With respect to normally ordered moments, the device has output noise mu(2)(G(2) - 1) where G = g(1)g(2) is the overall amplitude gain and mu(2) is a noise parameter. When mu(2) >= 1, our devices realize ideal (mu(2) = 1) and nonideal (mu(2) > 1) linear amplifiers. When 0 <= mu(2) < 1, these devices work effectively only over a restricted region of phase space and with some subunity success probability p (sic). We investigate the performance of our mu(2) amplifiers in terms of a gain-corrected probability-fidelity product and the ratio of input to output signal-to-noise ratios corrected for success probability.
Formatted abstract
We construct an amplifier that interpolates between a nondeterministic, immaculate linear amplifier and a deterministic, ideal linear amplifier and beyond to nonideal linear amplifiers. The construction involves cascading an immaculate linear amplifier that has amplitude gain g1 with a (possibly) nonideal linear amplifier that has gain g2. With respect to normally ordered moments, the device has output noise μ2(G2−1) where G=g1g2 is the overall amplitude gain and μ2 is a noise parameter. When μ2≥1, our devices realize ideal (μ2=1) and nonideal (μ2>1) linear amplifiers. When 0≤μ2<1, these devices work effectively only over a restricted region of phase space and with some subunity success probability p✓. We investigate the performance of our μ2 amplifiers in terms of a gain-corrected probability-fidelity product and the ratio of input to output signal-to-noise ratios corrected for success probability.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Optics
Physics
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID N00014-15-1-2167
PHY-1521106
CE110001013
CE110001027
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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