title: Quantum memory assisted probing of dynamical spin correlations.
abstract: We propose a method to probe time-dependent correlations of nontrivial observables in many-body ultracold lattice gases. The scheme uses a quantum nondemolition matter-light interface, first to map the observable of interest on the many-body system into the light and then to store coherently such information into an external system acting as a quantum memory. Correlations of the observable at two (or more) instances of time are retrieved with a single final measurement that includes the readout of the quantum memory. Such a method brings to reach the study of dynamics of many-body systems in and out of equilibrium by means of quantum memories in the field of quantum simulators.
authors.affiliation: Max-Planck-Institut für Quantenoptik, Garching, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Romero-Isart
authors.forename: M
authors.initials: M
authors.lastname: Rizzi
authors.forename: C A
authors.initials: CA
authors.lastname: Muschik
authors.forename: E S
authors.initials: ES
authors.lastname: Polzik
authors.forename: M
authors.initials: M
authors.lastname: Lewenstein
authors.forename: A
authors.initials: A
authors.lastname: Sanpera