Quantum Memory Assisted Probing of Dynamical Spin Correlations

TL;DR

This paper introduces a quantum memory-based method to probe time-dependent correlations in many-body ultracold gases, enabling the study of system dynamics in and out of equilibrium with a single measurement.

Contribution

It presents a novel quantum non-demolition scheme that maps and stores dynamical correlations using quantum memories, advancing quantum simulation capabilities.

Findings

Enables measurement of multi-time correlations with a single readout

Facilitates studying out-of-equilibrium dynamics in quantum simulators

Proposes a feasible interface between matter and light for quantum information storage

Abstract

We propose a method to probe time dependent correlations of non trivial observables in many-body ultracold lattice gases. The scheme uses a quantum non-demolition 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 method brings at 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.