title: Spin-Mixing Interferometry with Bose-Einstein Condensates.
abstract: Unstable spinor Bose-Einstein condensates are ideal candidates to create nonlinear three-mode interferometers. Our analysis goes beyond the standard SU(1,1) parametric approach and therefore provides the regime of parameters where sub-shot-noise sensitivities can be reached with respect to the input total average number of particles. Decoherence due to particle losses and finite detection efficiency are also considered.
authors.affiliation: Dipartimento di Fisica e Astronomia, Università degli Studi di Firenze, via Sansone 1, I-50019, Sesto Fiorentino, Italy.|QSTAR, INO-CNR and LENS, Largo Enrico Fermi 2, I-50125 Firenze, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Gabbrielli
authors.affiliation: QSTAR, INO-CNR and LENS, Largo Enrico Fermi 2, I-50125 Firenze, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Pezzè
authors.affiliation: QSTAR, INO-CNR and LENS, Largo Enrico Fermi 2, I-50125 Firenze, Italy.
authors.forename: Augusto
authors.initials: A
authors.lastname: Smerzi