Characterization of free-space quantum channels
arXiv:1810.05700 · doi:10.1117/12.2320037
Abstract
Many fundamental and applied experiments in quantum optics require transferring nonclassical states of light through large distances. In this context the free-space channels are a very promising alternative to optical fibers as they are mobile and enable to establish communications with moving objects, using satellites for global quantum links. For such channels the atmospheric turbulence is the main disturbing factor. The statistical properties of the fluctuating transmittance through the turbulent atmosphere are given by the probability distribution of transmittance (PDT). We derive the consistent PDTs for the atmospheric quantum channels by step-by-step inclusion of various atmospheric effects such as beam wandering, beam broadening and deformation of the beam into elliptic form, beam deformations into arbitrary forms. We discuss the applicability of PDT models for different propagation distances and optical turbulence strengths in the case when the receiver module has an annular aperture. We analyze the optimal detection and correction strategies which can improve the channel transmission characteristics. The obtained results are important for the design of optical experiments including postselection and adaptive strategies and for the security analysis of quantum communication protocols in free-space.
arXiv commentInvited talk given at SPIE Optical Engineering + Applications, 2018, San Diego, California, USA
References in corpus (21)
- Satellite-relayed intercontinental quantum network
- Practical free-space quantum key distribution over 10 km in daylight and at night
- Longer-Baseline Telescopes Using Quantum Repeaters
- Practical free-space quantum key distribution over 1 km
- High-fidelity transmission of entanglement over a high-loss freespace channel
- Cosmic Bell Test: Measurement Settings from Milky Way Stars
- Toward Global Quantum Communication: Beam Wandering Preserves Nonclassicality
- Atmospheric Quantum Channels with Weak and Strong Turbulence
- Quantum light in the turbulent atmosphere
- Free-space quantum links under diverse weather conditions
- Adaptive Real Time Selection for Quantum Key Distribution in Lossy and Turbulent Free-Space Channels
- Entanglement transfer through the turbulent atmosphere
- Free-space quantum signatures using heterodyne detection
- Theory of atmospheric quantum channels based on the law of total probability
- Pre-fixed Threshold Real Time Selection Method in Free-space Quantum Key Distribution
- Gaussian entanglement in the turbulent atmosphere
- Bell nonlocality in the turbulent atmosphere
- Free space quantum communication with a portable quantum memory
- Correlations of photon trajectories in the problem of light scintillations
- Quantum detection of wormholes
- Laser-beam scintillations for weak and moderate turbulence