Entanglement and Sensitivity in Precision Measurements with States of a Fluctuating Number of Particles
Anno: 2010
Autori: Hyllus P., Pezzé L., Smerzi A.
Affiliazione autori: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, I-38123 Povo, Italy;
Laboratoire Charles Fabry de l’Institut d’Optique, CNRS and Univ. Paris-Sud, Campus Polytechnique, RD 128, F-91127 Palaiseau cedex, France
Abstract: The concepts of separability, entanglement, spin squeezing, and the Heisenberg limit are central in the theory of quantum-enhanced metrology. In the current literature, these are well established only in the case of linear interferometers operating with input quantum states of a known fixed number of particles. This manuscript generalizes these concepts and extends the quantum phase estimation theory by taking into account classical and quantum fluctuations of the particle number. Our analysis concerns most of the current experiments on precision measurements where the number of particles is known only on average.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 105 (12) Da Pagina: 120501 A: 120501
Parole chiavi: quantum interferometry; heisenberg limit; entaglementDOI: 10.1103/PhysRevLett.105.120501Citazioni: 81dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-21Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui