Recycling Reflections for Perfect Photon Capture

TL;DR

This paper introduces a two-pass 'pitch-and-catch' method that recycles reflections to achieve perfect photon capture and emission in optical cavities, improving quantum information processing capabilities.

Contribution

The paper presents a novel two-pass reflection recycling technique that enables perfect photon capture and emission, surpassing limitations of single-pass methods in quantum optics.

Findings

Achieves perfect photon capture in noiseless regimes.

Enhances fidelity under intrinsic losses.

Enables arbitrary pulse shaping for emission.

Abstract

Efficient photon capture in optical cavities is essential for quantum networks and computing, yet single-pass methods suffer from uncaptured reflections due to finite capture windows and coupling strengths, precluding perfect transfer of arbitrary photonic states. We introduce a two-pass `pitch-and-catch' method that recycles initial reflections to achieve perfect capture of arbitrary pulses in the noiseless regime and enhances fidelity under intrinsic losses. The method extends to photon emission, enabling arbitrary pulse shaping. This advance offers significant improvements for quantum repeaters, memories, and transduction, enhancing the toolkit for quantum information processing.