Analysis of Optical Deshelving in Photon Echo-based Quantum Memories

TL;DR

This paper investigates how optical deshelving affects storage time in photon echo quantum memories, highlighting issues caused by incomplete population transfer and optical leakage dependent on optical depth.

Contribution

It provides an analysis of optical depth-dependent echo leakage mechanisms in photon echo quantum memories utilizing optical deshelving.

Findings

Optical leakage increases with optical depth.

Incomplete population transfer impacts phase recovery.

Storage time extension is limited by leakage mechanisms.

Abstract

Storage time extension in photon echoes using optical deshelving via a robust spin state has been investigated for absorption-dependent optical leakage, where an incomplete population transfer, even by a \pi optical pulse obviates the phase recovery condition of the deshelving. We analyze an optical depth-dependent echo leakage mechanism in the storage time extended photon echoes for the usage of optical deshelving to photon echo-based quantum memories.