title: Quantum polarization spectroscopy of ultracold spinor gases.
abstract: We propose a method for the detection of ground state quantum phases of spinor gases through a series of two quantum nondemolition measurements performed by sending off-resonant, polarized light pulses through the gas. Signatures of various mean-field as well as strongly correlated phases of F=1 and F=2 spinor gases obtained by detecting quantum fluctuations and mean values of polarization of transmitted light are identified.
authors.affiliation: Grup de Física Teórica, Universitat Autónoma de Barcelona, E-08193 Bellaterra, Spain.
authors.forename: K
authors.initials: K
authors.lastname: Eckert
authors.forename: L
authors.initials: L
authors.lastname: Zawitkowski
authors.forename: A
authors.initials: A
authors.lastname: Sanpera
authors.forename: M
authors.initials: M
authors.lastname: Lewenstein
authors.forename: E S
authors.initials: ES
authors.lastname: Polzik