The influence of the Earth's curved spacetime on Gaussian quantum coherence
arXiv:1910.02595 · doi:10.1088/1612-202X/ab2be4
Abstract
Light wave-packets propagating from the Earth to satellites will be deformed by the curved background spacetime of the Earth, thus influencing the quantum state of light. We show that Gaussian coherence of photon pairs, which are initially prepared in a two-mode squeezed state, is affected by the curved spacetime background of the Earth. We demonstrate that quantum coherence of the state increases for a specific range of height h and then gradually approaches a finite value with further increasing height of the satellite's orbit in Kerr spacetime, because special relativistic effect are involved. Meanwhile, we find that Gaussian coherence increases with the increase of Gaussian bandwidth parameter, but the Gaussian coherence decreases with the growth of the peak frequency. In addition, we also find that total gravitational frequency shift causes changes of Gaussian coherence less than and different initial peak frequencies also can effect rate of change with the satellite height in geostationary Earth orbits.
arXiv commentarXiv admin note: substantial text overlap with arXiv:1808.09100
References in corpus (39)
- Gaussian Quantum Information
- Quantum-enhanced measurements: beating the standard quantum limit
- Quantifying Coherence
- Peres-Horodecki separability criterion for continuous variable systems
- Inseparability criterion for continuous variable systems
- Operational Resource Theory of Coherence
- Measuring Quantum Coherence with Entanglement
- Reference frames, superselection rules, and quantum information
- Observable measure of quantum coherence in finite dimensional systems
- Catalytic Coherence
- Characterizing Nonclassical Correlations via Local Quantum Uncertainty
- Intrinsic randomness as a measure of quantum coherence
- Bell inequality violation with two remote atomic qubits
- Using entanglement against noise in quantum metrology
- Extending Noether's theorem by quantifying the asymmetry of quantum states
- A computable measure of nonclassicality for light
- Experimental Satellite Quantum Communications
- Quantum discord determines the interferometric power of quantum states
- Assisted distillation of quantum coherence
- Quantum interferometric visibility as a witness of general relativistic proper time
- The theory of manipulations of pure state asymmetry: basic tools and equivalence classes of states under symmetric operations
- Quantifying coherence of Gaussian states
- Spacetime effects on satellite-based quantum communications
- Spectral structure and decompositions of optical states, and their applications
- Quantum metrology for relativistic quantum fields
- Relativistic Quantum Metrology: Exploiting relativity to improve quantum measurement technologies
- Quantum estimation of the Schwarzschild space-time parameters of the Earth
- Irreversible degradation of quantum coherence under relativistic motion
- Disentanglement in Bipartite Continuous-Variable Systems
- Long-Distance Quantum Communication with Neutral Atoms
- Quantum Communication with an Accelerated Partner
- Experimental analysis of decoherence of quantumness in a continuous variables bi-partite entangled system
- Quantum communications and quantum metrology in the spacetime of a rotating planet
- Influence of relativistic effects on satellite-based clock synchronization
- Some Remarks on Quantum Coherence
- Fast optical source for quantum key distribution based on semiconductor optical amplifiers
- Satellite-based quantum steering under the influence of spacetime curvature of the Earth
- Quantum coherence in the Dynamical Casimir Effect
- Estimating space-time parameters with a quantum probe in a lossy environment