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.
- Received 15 March 2018
- Revised 26 April 2019
- Accepted 18 September 2020
DOI:https://doi.org/10.1103/PhysRevLett.125.163603
© 2020 American Physical Society
Physics Subject Headings (PhySH)
Nonlinear DynamicsAtomic, Molecular & OpticalQuantum Information, Science & TechnologyGeneral PhysicsStatistical Physics & Thermodynamics
