Super-resolution and super-sensitivity of quantum LiDAR with multi-photonic state and binary outcome photon counting measurement

TL;DR

This paper demonstrates that using multi-photonic states and binary photon counting measurements in a Mach-Zehnder interferometer enhances phase sensitivity and resolution in quantum LiDAR, outperforming traditional coherent states.

Contribution

It introduces multi-photonic states as a novel resource and analyzes their effectiveness in improving quantum LiDAR performance under lossless and lossy conditions.

Findings

Enhanced resolution and phase sensitivity compared to coherent states.

Multi-photonic states outperform even coherent superposition states.

Potential for improved quantum imaging and sensing applications.

Abstract

Here we are investigating the enhancement in phase sensitivity and resolution in Mach-Zehnder interferometer (MZI) based quantum LiDAR. We are using multi-photonic state (MPS), superposition of four coherent states [1], as the input state and binary outcome parity photon counting measurement and binary outcome zero-nonzero photon counting measurement as the measurement schemes. We thoroughly investigate the results in lossless as well as in lossy cases. We found enhancement in resolution and phase sensitivity in comparison to the coherent state and even coherent superposition state (ECSS) based quantum LiDAR. Our analysis shows that MPS may be an alternative nonclassical resource in the field of quantum imaging and quantum sensing technologies, like in quantum LiDAR.