Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/145780
Title: Phase-preserving linear amplifiers not simulable by the parametric amplifier
Authors: Chia, A.
Hajdušek, M.
Nair, Ranjith
Fazio, R.
Kwek, L. C.
Vedral, V.
Keywords: Science::Physics
Issue Date: 2020
Source: Chia, A., Hajdušek, M., Nair, R., Fazio, R., Kwek, L. C., & Vedral, V. (2020). Phase-preserving linear amplifiers not simulable by the parametric amplifier. Physical Review Letters, 125(16), 163603-. doi:10.1103/physrevlett.125.163603
Project: RG 127/14
NRF-CRP14-2014-02 
NRF-NRFF2016-02
MOE2019-T1-002-015
NRF2017-NRFANR004
Journal: Physical Review Letters
Abstract: It is commonly accepted that a parametric amplifier can simulate a phase-preserving linear amplifier regardless of how the latter is realized [C. M. Caves et al., Phys. Rev. A 86, 063802 (2012)]. If true, this reduces all phase-preserving linear amplifiers to a single familiar model. Here we disprove this claim by constructing two counterexamples. A detailed discussion of the physics of our counterexamples is provided. It is shown that a Heisenberg-picture analysis facilitates a microscopic explanation of the physics. This also resolves a question about the nature of amplifier-added noise in degenerate two-photon amplification.
URI: https://hdl.handle.net/10356/145780
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.125.163603
Rights: © 2020 American Physical Society (APS). All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society (APS).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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