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Article title
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Abstracts
Entanglement enhancement is a key task for quantum technologies.
This operation performed on states produced by
parametric down-conversion sources has been the object of
several recent experimental investigations. In particular, conditional
preparation by photon-subtraction has been shown to
improve the entanglement of these states. Here we analyse
the role played by non-Gaussian and Gaussian measurements
in more general entanglement concentration operations
performed on a pair of two-mode squeezed vacua.
We find stringent requirements for achieving an improved entanglement
enhancement by measuring jointly these two resource
states.
This operation performed on states produced by
parametric down-conversion sources has been the object of
several recent experimental investigations. In particular, conditional
preparation by photon-subtraction has been shown to
improve the entanglement of these states. Here we analyse
the role played by non-Gaussian and Gaussian measurements
in more general entanglement concentration operations
performed on a pair of two-mode squeezed vacua.
We find stringent requirements for achieving an improved entanglement
enhancement by measuring jointly these two resource
states.
Publisher
Year
Volume
Pages
5-11
Physical description
Dates
received
12 - 12 - 2012
online
13 - 02 - 2013
accepted
24 - 1 - 2013
Contributors
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom -
QOLS, Blackett Laboratory, Imperial College London,
London SW7 2BW, United Kingdom
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom -
Department of Physics, Shanghai Jiao Tong University,
Shanghai 200240, PR China
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom
author
-
Clarendon Laboratory, Department of Physics,
University of Oxford,
Oxford OX1 3PU, United Kingdom
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_qmetro-2013-0002