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

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.

4 pages, 2 figures, clarifying discussions added

References in corpus (4)

• Backreaction and Unruh effect: New insights from exact solutions of uniformly accelerated detectors
• Is there Unruh radiation?
• Quantum Entanglement of Electromagnetic Fields in Non-inertial Reference Frames
• Eavesdropping of quantum communication from a non-inertial frame

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• Relativistic quantum information and time machines
• Measurement-Induced-Nonlocality via the Unruh effect
• Teleportation of Accelerated Information
• Tripartite entanglement of fermionic system in accelerated frames
• Quantum correlation between a qubit and a relativistic boson in an expanding spacetime
• Unruh effect and information entropy approach
• Quantum conditional mutual information of W state in non-inertial frames