Details

Autor(en) / Beteiligte

• Chia, A.
• Hajdušek, M.
• Nair, R.
• Fazio, R.
• Kwek, L. C.
• Vedral, V.

Titel

Phase-Preserving Linear Amplifiers Not Simulable by the Parametric Amplifier

Ist Teil von

• Physical review letters, 2020-10, Vol.125 (16), p.163603-163603, Article 163603

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2020

Quelle

American Physical Society

Beschreibungen/Notizen

• 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.