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Null values and quantum state discrìmination

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2013

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Romito, Alessandro
Starling, David J.
Howland, Gregory A.
Broadbent, Curtis J.
Howell, John C.
Gefen, Yuval

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https://doi.org/10.1103/PhysRevLett.110.170405
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http://arxiv.org/abs/1205.3877v2

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Physical Review Letters. American Physical Society (APS). 2013, 110(17), 170405. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.170405

Zusammenfassung

We present a measurement protocol for discriminating between two different quantum states of a qubit with high fidelity. The protocol, called null value, is comprised of a projective measurement performed on the system with a small probability (also known as partial collapse), followed by a tuned postselection. We report on an optical experimental implementation of the scheme. We show that our protocol leads to an amplified signal-to-noise ratio (as compared with a straightforward strong measurement) when discerning between the two quantum states.

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ISO 690ZILBERBERG, Oded, Alessandro ROMITO, David J. STARLING, Gregory A. HOWLAND, Curtis J. BROADBENT, John C. HOWELL, Yuval GEFEN, 2013. Null values and quantum state discrìmination. In: Physical Review Letters. American Physical Society (APS). 2013, 110(17), 170405. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.170405
BibTex
@article{Zilberberg2013-04-26value-54922,
  year={2013},
  doi={10.1103/PhysRevLett.110.170405},
  title={Null values and quantum state discrìmination},
  number={17},
  volume={110},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Zilberberg, Oded and Romito, Alessandro and Starling, David J. and Howland, Gregory A. and Broadbent, Curtis J. and Howell, John C. and Gefen, Yuval},
  note={Article Number: 170405}
}
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