Optimal control of non-Markovian dynamics in a single-mode cavity strongly coupled to an inhomogeneously broadened spin ensemble

Abstract

Ensembles of quantum mechanical spins offer a promising platform for quantum memories, but proper functionality requires accurate control of unavoidable system imperfections. We present an efficient control scheme for a spin ensemble strongly coupled to a single-mode cavity based on a set of Volterra equations relying solely on weak classical control pulses. The viability of our approach is demonstrated in terms of explicit storage and readout sequences that will serve as a starting point towards the realization of more demanding full quantum mechanical optimal control schemes.

Optimal control of an inhomogeneous spin ensemble coupled to a cavity

“…We show the efficiency of the corresponding optimal fields for enhancing the signal to noise ratio (SNR) of the detection process and its sensitivity, that is the minimum number of spins per echo that can be detected with signal-to-noise ratio of 1. Note that closely related works have recently investigated the optimal control of such systems for quantum information applications (see e.g [54][55][56][57][58][59][60] to cite a few). The remainder of this paper is organized as follows.…”