http://www.cnr.it/ontology/cnr/individuo/prodotto/ID205547
Useful multiparticle entanglement and sub-shot-noise sensitivity in experimental phase estimation (Articolo in rivista)
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- Useful multiparticle entanglement and sub-shot-noise sensitivity in experimental phase estimation (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevLett.107.080504 (literal)
- Alternative label
Krischek Roland [ 1,2 ] ; Schwemmer Christian [ 1,2 ] ; Wieczorek Witlef [ 1,2 ] ; Weinfurter Harald [ 1,2 ] ; Hyllus Philipp [ 3,4 ] ; Pezze Luca [ 5 ] ; Smerzi Augusto [ 3,4 ] (2011)
Useful multiparticle entanglement and sub-shot-noise sensitivity in experimental phase estimation
in Physical review letters (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Krischek Roland [ 1,2 ] ; Schwemmer Christian [ 1,2 ] ; Wieczorek Witlef [ 1,2 ] ; Weinfurter Harald [ 1,2 ] ; Hyllus Philipp [ 3,4 ] ; Pezze Luca [ 5 ] ; Smerzi Augusto [ 3,4 ] (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- [ 1 ] Univ Munich, Fak Phys, D-80799 Munich, Germany
[ 2 ] Max Planck Inst Quantum Opt, D-85748 Garching, Germany
[ 3 ] Univ Trent, INO CNR BEC Ctr, I-38123 Povo, Italy
[ 4 ] Univ Trent, Dipartimento Fis, I-38123 Povo, Italy
[ 5 ] Univ Paris 11, Lab Charles Fabry, Inst Opt, CNRS,UMR 8501, F-91127 Palaiseau, France (literal)
- Titolo
- Useful multiparticle entanglement and sub-shot-noise sensitivity in experimental phase estimation (literal)
- Abstract
- We experimentally demonstrate a general criterion to identify entangled states useful for the estimation of an unknown phase shift with a sensitivity higher than the shot-noise limit. We show how to exploit this entanglement on the examples of a maximum likelihood as well as of a Bayesian phase estimation protocol. Using an entangled four-photon state we achieve a phase sensitivity clearly beyond the shot-noise limit. Our detailed comparison of methods and quantum states for entanglement enhanced metrology reveals the connection between multiparticle entanglement and sub-shot-noise uncertainty, both in a frequentist and in a Bayesian phase estimation setting. (literal)
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