Quantum-limited measurements of optical signals from a geostationary satellite

@article{Gnthner2016QuantumlimitedMO,
  title={Quantum-limited measurements of optical signals from a geostationary satellite},
  author={Kevin G{\"u}nthner and Imran Khan and Dominique Elser and Birgit Stiller and {\"O}mer Bayraktar and Christian R. M{\"u}ller and Karen Saucke and Daniel Tr{\"o}ndle and Frank Heine and Stefan Seel and Peter Greulich and Herwig Zech and Bj{\"o}rn G{\"u}tlich and Ines Richter and Michael Lutzer and Sabine Philipp-May and Rolf Meyer and Christoph Marquardt and Gerd Leuchs},
  journal={ArXiv},
  year={2016},
  volume={abs/1608.03511}
}
The measurement of quantum signals that traveled through long distances is of fundamental and technological interest. We present quantum-limited coherent measurements of optical signals, sent from a satellite in geostationary Earth orbit to an optical ground station. We bound the excess noise that the quantum states could have acquired after having propagated 38600 km through Earth's gravitational potential as well as its turbulent atmosphere. Our results indicate that quantum communication is… 

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References

SHOWING 1-10 OF 147 REFERENCES
Atmospheric Quantum Channels with Weak and Strong Turbulence.
TLDR
This work derives the probability distribution for the atmospheric transmittance including beam wandering, beam shape deformation, and beam-broadening effects from the elliptic beam approximation, and applies to weak, weak-to-moderate, and strong turbulence.
Spacetime effects on satellite-based quantum communications
We investigate the consequences of space-time being curved on space-based quantum communication protocols. We analyze tasks that require either the exchange of single photons in a certain
Experimental single photon exchange along a space link of 7000 km
Extending the single photon transmission distance is a basic requirement for the implementation of quantum communication on a global scale. In this work we report the single photon exchange from a
Entanglement-based quantum communication over 144km
Quantum entanglement is the main resource to endow the field of quantum information processing with powers that exceed those of classical communication and computation. In view of applications such
LEO-to-ground polarization measurements aiming for space QKD using Small Optical TrAnsponder (SOTA).
TLDR
The results of the campaign to measure the polarization characteristics of the SOTA laser sources after propagating from LEO to ground are presented, including the first-time measurement of a linearly-polarized source at λ = 976 nm and a circularly-polarsized source from space using a realistic QKD-like receiver.
Free-Space and Atmospheric Quantum Communications
The quantum internet with free-space and atmospheric quantum channels is becoming a reality [1, 2]. Emerging from the early ideas of Feynman and his colleagues [3], quantum information science (QIS)
Atmospheric continuous-variable quantum communication
We present a quantum communication experiment conducted over a point-to-point free-space link of 1.6 km in urban conditions. We study atmospheric influences on the capability of the link to act as a
Experimental quantum key distribution with simulated ground-to-satellite photon losses and processing limitations
TLDR
The feasibility of a trusted quantum receiver on an orbiting satellite using a QKD protocol, with optical transmission and full post-processing, in the high-loss regime using minimized computing hardware at the receiver is demonstrated.
Free space quantum key distribution with coherent polarization states
Free space QKD over an atmospheric channel was demonstrated in 1996 for the first time [1]. Since then, several prepare-and-measure and entanglement-based schemes have been implemented (for a
Free-Space distribution of entanglement and single photons over 144 km
Quantum Entanglement is the essence of quantum physics and inspires fundamental questions about the principles of nature. Moreover it is also the basis for emerging technologies of quantum
...
...