Photon distillation schemes with reduced resource costs based on multiphoton Fourier interference

TL;DR

This paper introduces a scalable photon distillation scheme using multiphoton Fourier interference that reduces resource costs and error rates in photonic quantum computing, enabling more efficient and feasible quantum devices.

Contribution

It proposes a novel, resource-efficient scheme for photon distillation that achieves arbitrary error reduction in a single step using multiphoton interference.

Findings

Resource costs scale linearly with error reduction.

The scheme has a constant success probability for any error reduction.

It enhances error correction thresholds and reduces resource requirements for photonic quantum computers.

Abstract

We present a scalable scheme to achieve photon distillation, i.e. the preparation of a single photon with reduced indistinguishability error out of multiple imperfect photons, based on multiphoton interference in Fourier matrices. Our scheme achieves arbitrary error reduction in a single step, removing the need to concatenate multiple rounds of the protocol. Our scheme has resource costs linear in the error reduction, and a constant probability of success for arbitrary error reductions. We find that the scheme both raises the threshold of error correcting codes in photonic quantum computers, as well as reduces the resources required to construct a photonic quantum computer, making it highly promising for implementation in such devices.