Remote temporal wavepacket narrowing

TL;DR

This paper experimentally demonstrates remote temporal wavepacket narrowing of heralded single photons using time-resolved measurements on entangled partners, enhancing quantum communication and synchronization protocols.

Contribution

It provides the first experimental validation of remote wavepacket narrowing via time-resolved heralding, building on a prior theoretical proposal.

Findings

Successful experimental demonstration of wavepacket narrowing

Identification of optimal photon source characteristics

Enhanced potential for quantum communication protocols

Abstract

Quantum communication and clock synchronization protocols can be significantly enhanced by the careful preparation of the wavepackets of the produced photons. Following the theoretical proposal published in [Optica, 4, 84 (2017)], we experimentally demonstrate the effect of a remote temporal wavepacket narrowing of a heralded single photon. It is performed by utilizing the time-resolved measurement on the heralding photon which is frequency entangled with the heralded one. We also investigate optimal photon pair source characteristics that minimize the heralded wavepacket width.