Quantum filtering for systems driven by fields in single-photon states or superposition of coherent states

John E. Gough, Matthew R. James, Hendra I. Nurdin, and Joshua Combes
Phys. Rev. A 86, 043819 – Published 15 October 2012

Abstract

We derive the stochastic master equations, that is to say, quantum filters, and master equations for an arbitrary quantum system probed by a continuous-mode bosonic input field in two types of nonclassical states. Specifically, we consider the cases where the state of the input field is a superposition or combination of (1) a continuous-mode, single-photon wave packet and vacuum, and (2) any continuous-mode coherent states.

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  • Received 14 July 2011

DOI:https://doi.org/10.1103/PhysRevA.86.043819

©2012 American Physical Society

Authors & Affiliations

John E. Gough1,*, Matthew R. James2,†, Hendra I. Nurdin3,‡, and Joshua Combes4,§

  • 1Institute of Mathematics and Physics, Aberystwyth University, SY23 3BZ, Wales, United Kingdom
  • 2ARC Centre for Quantum Computation and Communication Technology, Research School of Engineering, Australian National University, Canberra, ACT 0200, Australia
  • 3Research School of Engineering, The Australian National University, Canberra, ACT 0200, Australia
  • 4Center for Quantum Information and Control, University of New Mexico, Albuquerque, NM 87131-0001, USA

  • *jug@aber.ac.uk
  • matthew.james@anu.edu.au
  • School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW 2052, Australia; h.nurdin@unsw.edu.au
  • §combes@unm.edu

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Issue

Vol. 86, Iss. 4 — October 2012

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