2016
DOI: 10.1103/physrevapplied.5.054022
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Generation and Analysis of Correlated Pairs of Photons aboard a Nanosatellite

Abstract: Satellites carrying sources of entangled photons could establish a global quantum network, enabling private encryption keys between any two points on Earth. Despite numerous proposals, demonstration of space-based quantum systems has been limited due to the cost of traditional satellites. We are using very small spacecraft to accelerate progress. We report the in-orbit operation of a photon pair source aboard a 1.65 kg nanosatellite and demonstrate pair generation and polarization correlation under space condi… Show more

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Cited by 75 publications
(78 citation statements)
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“…FSO quantum communication via satellites [39]- [63], [65]- [70] has the additional advantage that communications can still take place, even when there is no direct free-space LoS from A to B. That is, assuming that LoS paths from a satellite to two ground stations exist, satellite-based FSO communication can still proceed.…”
Section: Quantum Key Distributionmentioning
confidence: 99%
“…FSO quantum communication via satellites [39]- [63], [65]- [70] has the additional advantage that communications can still take place, even when there is no direct free-space LoS from A to B. That is, assuming that LoS paths from a satellite to two ground stations exist, satellite-based FSO communication can still proceed.…”
Section: Quantum Key Distributionmentioning
confidence: 99%
“…Silicon APDs are good candidates for detectors in the ISS segment, because they have good photon detection characteristics around 830nm, are well understood, widely used in quantum optics, and do not require deep cryogenic cooling [45]. However, proton radiation present in LEO damages the APDs and drastically increases their dark count rate over time [46][47][48][49][50]. Here we simulate the radiation environment inside the ISS to study the feasibility of using Si APDs.…”
Section: Appendix Feasibility Of Using Si Apds As Single-photon Detementioning
confidence: 99%
“…The results are listed in table 1. However, sample-to-sample variations and uncertainty of radiation environment prediction [50] necessitate a reserve factor. We assume the detector design needs to be able to cope with factor of 3 worse dark count rates than predicted, which requires cooling by an additional ≈15°C.…”
Section: Appendix Feasibility Of Using Si Apds As Single-photon Detementioning
confidence: 99%
“…Progress of practical and commercial polarization entanglement sources so far has been mostly made in the design and optimization of nonlinear crystals or waveguides [8][9][10][11][12][13]. These sources, while being efficient and bright in the generation of photon pairs, still require tedious optical alignment, employ free-space or waveguide coupling optics, and thus require expensive rugged packaging to withstand harsher conditions of infield operation.…”
mentioning
confidence: 99%