Nonlocal linear compression of two-photon time interval distribution

TL;DR

This paper introduces a linear compression method for two-photon time interval distributions that preserves ultra-narrow widths using phase modulation, reducing phase-instability effects.

Contribution

It presents a novel linear compression technique for two-photon time intervals that maintains minimal width regardless of initial conditions, enhancing quantum measurement precision.

Findings

Compressed TP time interval width remains at the phase modulation limit.

Compression effectiveness is independent of initial width.

Reduces phase-instability damage during compression.

Abstract

We propose a linear compression technique for the time interval distribution of photon pairs. Using a partially frequency-entangled two-photon (TP) state with appropriate mean time width, the compressed TP time interval width can be kept in the minimum limit set by the phase modulation, and is independent of its initial width. As a result of this effect, ultra-narrow TP time interval distribution can be compressed with relatively slow phase modulators to decrease the damage of the phase-instability arising from the phase modulation process.