16-QAM Quantum Receiver with Hybrid Structure Outperforming the Standard Quantum Limit

TL;DR

This paper introduces a hybrid quantum receiver for 16-QAM signals that surpasses the standard quantum limit by combining homodyne and displacement detection methods, with performance enhancements through optimization.

Contribution

The novel hybrid receiver design achieves better discrimination of 16-QAM signals than existing quantum limits, demonstrating improved performance through optimized displacement.

Findings

Outperforms the standard quantum limit in 16-QAM discrimination

Hybrid structure combining homodyne and displacement detection

Performance improved by optimized displacement

Abstract

We present a quantum receiver for 16-QAM signals discrimination with hybrid structure containing a homodyne receiver and a displacement receiver, which can outperform the SQL, and the performance can be improved by an optimized displacement.