Generating Entangled Photons from the Vacuum by Accelerated Measurements: Quantum Information Theory Meets the Unruh-Davies Effect

TL;DR

This paper explores how accelerated measurements can generate entangled photons from the vacuum, linking quantum information theory with relativistic effects, and demonstrates potential applications in quantum communication.

Contribution

It introduces a novel method for generating entangled photons via accelerated measurements, combining quantum information theory with the Unruh-Davies effect.

Findings

Accelerated measurements excite real particles from the vacuum in the inertial frame.

Particles created are highly entangled, enabling maximally entangled two-qubit states.

Single qubit information can be perfectly transmitted between observers.

Abstract

Building on the well-known Unruh-Davies effect, we examine the effects of projective measurements and quantum communications between accelerated and stationary observers. We find that the projective measurement by a uniformly accelerated observer can excite real particles from the vacuum in the inertial frame, even if no additional particles are created by the measurement process in the accelerating frame. Furthermore, we show that the particles created by this accelerating measurement can be highly entangled in the inertial frame, and it is also possible to use this process to generate even maximally entangled two-qubit states by a certain arrangement of measurements. As a byproduct of our analysis, we also show that a single qubit of information can be perfectly transmitted from the accelerating observer to the inertial one. In principle, such an effect could be exploited in designing an entangled state generator for quantum communication.