Effect of relativistic motion on witnessing non-classicality of quantum states

TL;DR

This paper demonstrates that the perception of non-classicality in quantum states varies with the observer's relativistic motion, revealing that non-inertial and inertial detectors differently influence quantum state witnessing.

Contribution

It introduces a relativistic framework showing how observer motion affects the operational detection of quantum non-classicality using the Unruh-DeWitt detector model.

Findings

Inertial motion yields different non-classicality witness results compared to non-inertial motion.

The detector's trajectory significantly influences the witness based on the P-representation.

Relativistic effects must be considered in quantum state non-classicality detection.

Abstract

We show that the operational definition of non-classicality of a quantum state depends on the motion of the observer. We use the relativistic Unruh-DeWitt detector model to witness nonclassicality of the probed field state. It turns out that the witness based on the properties of the P-representation of the quantum state depends on the trajectory of the detector. Inertial and noninertial motion of the device have qualitatively different impact on the performance of the witness.