Requirements for two-source entanglement
concentration

• Authors: Mihai Vidrighin , Tim J. Bartley , Gaia Donati , Xian-Min Jin , Marco Barbieri , W. Steven Kolthammer , Animesh Datta , Ian A. Walmsley
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

entaglement distillation; non-Gaussian measurements; quantum optics

• Journal: Quantum Measurements and Quantum Metrology
• Year: 2013
• Volume: 1
• Pages: 5-11

Dates

received

12 - 12 - 2012

online

13 - 02 - 2013

accepted

24 - 1 - 2013

Contributors

author

Mihai Vidrighin

• 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

Tim J. Bartley

• Clarendon Laboratory, Department of Physics,
  University of Oxford,
  Oxford OX1 3PU, United Kingdom

author

Gaia Donati

• Clarendon Laboratory, Department of Physics,
  University of Oxford,
  Oxford OX1 3PU, United Kingdom

author

Xian-Min Jin

• 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

Marco Barbieri

• Clarendon Laboratory, Department of Physics,
  University of Oxford,
  Oxford OX1 3PU, United Kingdom

author

W. Steven Kolthammer

• Clarendon Laboratory, Department of Physics,
  University of Oxford,
  Oxford OX1 3PU, United Kingdom

author

Animesh Datta

• Clarendon Laboratory, Department of Physics,
  University of Oxford,
  Oxford OX1 3PU, United Kingdom

author

Ian A. Walmsley

• Clarendon Laboratory, Department of Physics,
  University of Oxford,
  Oxford OX1 3PU, United Kingdom

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Identifiers

DOI

10.2478/qmetro-2013-0002