Temporal modulation of a spectral compressor for efficient quantum storage

TL;DR

This paper introduces a method to enhance quantum memory efficiency by dynamically modulating a spectral compressor to achieve both spectral and temporal mode matching of photons, using a time-variant optical cavity.

Contribution

It extends previous spectral compression techniques to include temporal mode matching through a novel time-varying cavity approach, with numerical analysis and implementation prospects.

Findings

Numerical analysis shows effective mode matching with low loss

Proposed implementation feasible in integrated photonics

Enhanced quantum memory interaction through combined spectral and temporal matching

Abstract

Spectral and temporal mode matching are required for the efficient interaction of photons and quantum memories. In our previous work, we proposed a new route to spectrally compress broadband photons to achieve spectral mode matching with narrowband memories, using a linear, time-variant optical cavity based on rapid switching of input coupling. In this work, we extend our approach to attain temporal mode matching as well by exploiting the time-variation of output coupling of the cavity. We numerically analyze the mode matching and loss performance of our time-varying cavity and present a possible implementation in integrated photonics.