dorsal/arxiv
View SchemaOptimal control of entanglement via quantum feedback
| Authors | Stefano Mancini, Howard M. Wiseman |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0610006 |
| URL | https://arxiv.org/abs/quant-ph/0610006 |
| DOI | 10.1103/PhysRevA.75.012330 |
| Journal | Phys. Rev. A 75, 012330 (2007). |
Abstract
It has recently been shown that finding the optimal measurement on the environment for stationary Linear Quadratic Gaussian control problems is a semi-definite program. We apply this technique to the control of the EPR-correlations between two bosonic modes interacting via a parametric Hamiltonian at steady state. The optimal measurement turns out to be nonlocal homodyne measurement -- the outputs of the two modes must be combined before measurement. We also find the optimal local measurement and control technique. This gives the same degree of entanglement but a higher degree of purity than the local technique previously considered [S. Mancini, Phys. Rev. A {\bf 73}, 010304(R) (2006)].
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"abstract": "It has recently been shown that finding the optimal measurement on the\nenvironment for stationary Linear Quadratic Gaussian control problems is a\nsemi-definite program. We apply this technique to the control of the\nEPR-correlations between two bosonic modes interacting via a parametric\nHamiltonian at steady state. The optimal measurement turns out to be nonlocal\nhomodyne measurement -- the outputs of the two modes must be combined before\nmeasurement. We also find the optimal local measurement and control technique.\nThis gives the same degree of entanglement but a higher degree of purity than\nthe local technique previously considered [S. Mancini, Phys. Rev. A {\\bf 73},\n010304(R) (2006)].",
"arxiv_id": "quant-ph/0610006",
"authors": [
"Stefano Mancini",
"Howard M. Wiseman"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.75.012330",
"journal_ref": "Phys. Rev. A 75, 012330 (2007).",
"title": "Optimal control of entanglement via quantum feedback",
"url": "https://arxiv.org/abs/quant-ph/0610006"
},
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