Experimental demonstration of a time-domain multidimensional quantum channel

TL;DR

This paper demonstrates an experimental setup for a controllable multidimensional quantum channel using temporal encoding, showing potential for integration with existing fiber-optic telecommunications infrastructure.

Contribution

It introduces a novel, flexible method for encoding multidimensional quantum information in the temporal domain with electronic control.

Findings

Successful encoding and decoding of quantum information in temporal degrees of freedom

Feasibility of transmitting multidimensional quantum data over fiber-optic networks

Electronic control enables adaptable quantum channel dimensionality

Abstract

We present the first experimental realization of a flexible multidimensional quantum channel where the Hilbert space dimensionality can be controlled electronically. Using electro-optical modulators (EOM) and narrow-band optical filters, quantum information is encoded and decoded in the temporal degrees of freedom of photons from a long-coherence-time single-photon source. Our results demonstrate the feasibility of a generic scheme for encoding and transmitting multidimensional quantum information over the existing fiber-optical telecommunications infrastructure.