Input-Output Theory with Quantum Pulses

Alexander Holm Kiilerich and Klaus Mølmer
Phys. Rev. Lett. 123, 123604 – Published 18 September 2019
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Abstract

We present a formalism that accounts for the interaction of a local quantum system, such as an atom or a cavity, with traveling pulses of quantized radiation. We assume Markovian coupling of the stationary system to the input and output fields and nondispersive asymptotic propagation of the pulses before and after the interaction. This permits derivation of a master equation where the input and output pulses are treated as single oscillator modes that both couple to the local system in a cascaded manner. As examples of our theory, we analyze reflection by an empty cavity with phase noise, stimulated atomic emission by a quantum light pulse, and formation of a Schrödinger-cat state by the dispersive interaction of a coherent pulse and a single atom in a cavity.

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  • Received 26 February 2019
  • Corrected 30 July 2020

DOI:https://doi.org/10.1103/PhysRevLett.123.123604

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyGeneral PhysicsAtomic, Molecular & Optical

Corrections

30 July 2020

Correction: Equations (5) and (6) contained minor errors and have been fixed. Related Eqs. (S1) and (S2) in the Supplemental Material have also been fixed and the new file has been uploaded.

Authors & Affiliations

Alexander Holm Kiilerich* and Klaus Mølmer

  • Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK 8000 Aarhus C, Denmark

  • *kiilerich@phys.au.dk
  • moelmer@phys.au.dk

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Issue

Vol. 123, Iss. 12 — 20 September 2019

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