Quantum memory with a controlled homogeneous splitting

DOI10.1088/1367-2630/15/4/045015zbMATH Open1451.81169arXiv1208.0677OpenAlexW2162436607WikidataQ61155186 ScholiaQ61155186MaRDI QIDQ5141477

D. Wilkowski, G. Hétet, T. Chanelière

Publication date: 18 December 2020

Published in: New Journal of Physics (Search for Journal in Brave)

Abstract: We propose a quantum memory protocol where a input light field can be stored onto and released from a single ground state atomic ensemble by controlling dynamically the strength of an external static and homogeneous field. The technique relies on the adiabatic following of a polaritonic excitation onto a state for which the forward collective radiative emission is forbidden. The resemblance with the archetypal Electromagnetically-Induced-Transparency (EIT) is only formal because no ground state coherence based slow-light propagation is considered here. As compared to the other grand category of protocols derived from the photon-echo technique, our approach only involves a homogeneous static field. We discuss two physical situations where the effect can be observed, and show that in the limit where the excited state lifetime is longer than the storage time, the protocols are perfectly efficient and noise-free. We compare the technique to other quantum memories, and propose atomic systems where the experiment can be realized.

Full work available at URL: https://arxiv.org/abs/1208.0677

Mathematics Subject Classification ID

Quantum computation (81P68) Quantum gates (81P65)