Entanglement-enhanced quantum ranging in the near-Earth spacetime
arXiv:2205.05441 · doi:10.1002/qute.202300182
Abstract
We propose a quantum ranging protocol to determine the distance between an observer and a target at the line of sight in the near-Earth curved spacetime. Unlike the quantum illumination scheme, here we employ multiple quantum hypothesis testing to decide the presence and location of the target at the same time. In the present protocol, the gravity of the Earth influences the propagation of photons and the performance of quantum ranging. We find that the maximum potential advantages of the quantum ranging strategy in the curved spacetime outperform its flat spacetime counterpart. This is because the effect of gravitational red-shift and blue-shift on the entangled signal photons can be canceled out, while the thermal photons only suffers from the gravitational blue-shift effect. We also show that the number of transmitted modes can promote the maximum potential advantage of the quantum ranging tasks. The maximum potential advantage of quantum ranging in the curved spacetime can not be raised sharply by dividing the range into multiple slices.
15 pages, 4 figures
References in corpus (20)
- Quantum Illumination with Gaussian States
- Microwave Quantum Illumination
- Quantum Illumination at the Microwave Wavelengths
- Experimental realisation of quantum illumination
- Bell inequality violation with two remote atomic qubits
- Entanglement-Enhanced Sensing in a Lossy and Noisy Environment
- Gaussian-state quantum-illumination receivers for target detection
- Gravitational Decoherence
- Optimum mixed-state discrimination for noisy entanglement-enhanced sensing
- Relativistic Quantum Teleportation with Superconducting Circuits
- Spectral structure and decompositions of optical states, and their applications
- Quantum estimation of the Schwarzschild space-time parameters of the Earth
- Entangling moving cavities in non-inertial frames
- Quantum Illumination with a generic Gaussian source
- Quantum illumination for enhanced detection of Rayleigh-fading targets
- Entanglement-enhanced testing of multiple quantum hypotheses
- Experimental Quantum Target Detection Approaching the Fundamental Helstrom Limit
- Generation of genuine tripartite entanglement for continuous variables in de Sitter space
- Gravitational redshift induces quantum interference
- Observer dependence of photon bunching: The influence of the relativistic redshift on Hong-Ou-Mandel interference