title: Probing spatial spin correlations of ultracold gases by quantum noise spectroscopy.
abstract: Spin noise spectroscopy with a single laser beam is demonstrated theoretically to provide a direct probe of the spatial correlations of cold fermionic gases. We show how the generic many-body phenomena of antibunching, pairing, antiferromagnetic, and algebraic spin liquid correlations can be revealed by measuring the spin noise as a function of laser width, temperature, and frequency.
authors.affiliation: Dipartimento di Fisica, Università di Trento and CNR-INFM BEC Center, I-38050 Povo, Trento, Italy.
authors.forename: G M
authors.initials: GM
authors.lastname: Bruun
authors.forename: Brian M
authors.initials: BM
authors.lastname: Andersen
authors.forename: Eugene
authors.initials: E
authors.lastname: Demler
authors.forename: Anders S
authors.initials: AS
authors.lastname: Sørensen