Proposal for optical parity state re-encoder

TL;DR

This paper introduces a re-encoder for parity encoded quantum states, enabling the generation of refreshed states using existing technology, simplifying previous schemes.

Contribution

It presents a practical re-encoder for parity states based on Gilchrist et al.'s scheme, demonstrating feasibility with current quantum technology.

Findings

Feasibility of implementing parity state re-encoding with current technology

Simplification of parity state refresh procedures

Potential for improved quantum error correction protocols

Abstract

We propose a re-encoder to generate a refreshed parity encoded state from an existing parity encoded state. This is the simplest case of the scheme by Gilchrist et al. (Phys. Rev. A 75, 052328). We show that it is possible to demonstrate with existing technology parity encoded quantum gates and teleportation.