Proposed Experiment in Two-Qubit Linear Optical Photonic Gates for Maximal Success Rates

TL;DR

This paper proposes a feasible linear optical quantum computing experiment to implement two-qubit gates with higher success rates than current theoretical limits, using controllable fidelity and accessible apparatus.

Contribution

It introduces a practical experimental setup for two-qubit photonic gates with success rates surpassing the known maximum for perfect fidelity, advancing photonic quantum computing capabilities.

Findings

Proposed an experiment with success rates above 2/27

Designed a simple apparatus for controllable fidelity gates

Demonstrated feasibility for experimental implementation

Abstract

Here we propose an experiment in Linear Optical Quantum Computing (LOQC) using the framework first developed by Knill, Laflamme, and Milburn. This experiment will test the ideas of the authors' previous work on imperfect LOQC gates using number-resolving photon detectors. We suggest a relatively simple physical apparatus capable of producing CZ gates with controllable fidelity less than 1 and success rates higher than the current theoretical maximum (S=2/27) for perfect fidelity. These experimental setups are within the reach of many experimental groups and would provide an interesting experiment in photonic quantum computing.