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Determination of Maximal Gaussian Entanglement Achievable by Feedback-Controlled Dynamics

Serafini, A; Mancini, S; (2010) Determination of Maximal Gaussian Entanglement Achievable by Feedback-Controlled Dynamics. PHYS REV LETT , 104 (22) , Article 220501. 10.1103/PhysRevLett.104.220501. Green open access

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Abstract

We determine a general upper bound for the steady-state entanglement achievable by continuous feedback for a system of any number of bosonic degrees of freedom. We apply such a bound to the specific case of parametric interactions-the most common practical way to generate entanglement in quantum optics-and single out optimal feedback strategies that achieve the maximal entanglement. We also consider the case of feedback schemes entirely restricted to local operations and compare their performance to the optimal, generally nonlocal, schemes.

Type: Article
Title: Determination of Maximal Gaussian Entanglement Achievable by Feedback-Controlled Dynamics
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.104.220501
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.104.220501
Language: English
Additional information: © 2010 The American Physical Society
Keywords: QUANTUM, INVARIANCE, SYSTEMS
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/114023
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