Controlling entanglement by direct quantum feedback

A. R.R. Carvalho; A. J.S. Reid; J. J. Hope

doi:10.1103/PhysRevA.78.012334

Controlling entanglement by direct quantum feedback

A. R.R. Carvalho, A. J.S. Reid, J. J. Hope

Research output: Contribution to journal › Article › peer-review

121 Citations (Scopus)

Abstract

We discuss the generation of entanglement between electronic states of two atoms in a cavity using direct quantum feedback schemes. We compare the effects of different control Hamiltonians and detection processes in the performance of entanglement production and show that the quantum-jump-based feedback proposed by Carvalho and Hope [Phys. Rev. A 76, 010301(R) (2007)] can protect highly entangled states against decoherence. We provide analytical results that explain the robustness of jump feedback, and also analyze the perspectives of experimental implementation by scrutinizing the effects of imperfections and approximations in our model.

Original language	English
Article number	012334
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	78
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.78.012334
Publication status	Published - 18 Jul 2008

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Controlling entanglement by direct quantum feedback

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