Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/22558
Title: 
Authors: 
Subjects: 
Statistical Physics
General Physics
Quantum Information
Atomic, Molecular & Optical
Nonlinear Dynamics
Issue Date: 
2020
Citation: 
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), Article 163603. https://doi.org/10.1103/PhysRevLett.125.163603
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: 
ISSN: 
0031-9007 (print)
1079-7114 (online)
DOI: 
Grant ID: 
MOE RG 127/14
Competitive Research Programme (CRP Award No. NRF-CRP- 14-2014-02)
NRF Fellowship Reference No. NRF-NRFF2016- 02
NRF Fellowship Reference No. NRF-CRP14-2014-02
MOE2019-T1-002-015
National Research Foundation Singapore and the Agence Nationale de la Recherche (Grant no. NRF2017-NRFANR004 VanQuTe)
Foundational Questions Institute (Grant no. FQXi-RFP-IPW- 1903)
Air Force Office of Scientific Research (Grant no. FA2386-19-1-4038)
Funding Agency: 
Ministry of Education, Singapore
National Research Foundation, Singapore
File Permission: 
Open
File Availability: 
With file
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