Linear-Optical Implementation of Perfect Discrimination between Single-bit Unitary Operations

TL;DR

This paper demonstrates experimentally perfect discrimination between single-bit unitary operations using linear optics, comparing sequential and parallel schemes in terms of complexity and resource consumption.

Contribution

It introduces and experimentally validates two methods for perfect discrimination of single-bit unitaries with linear optics, analyzing their resource efficiency.

Findings

Successful experimental demonstration of perfect discrimination.

Comparison of sequential and parallel schemes' complexity.

Insights into resource requirements for each scheme.

Abstract

Discrimination of unitary operations is a fundamental quantum information processing task. Assisted with linear optical elements, we experimentally demonstrate perfect discrimination between single-bit unitary operations using two methods--sequential scheme and parallel scheme. The complexity and resource consumed in these two schemes are analyzed and compared.