Polarization Calibration Scheme for a Practical Handheld Free Space Quantum Key Distribution Link

Zhou, Lai; Lowndes, David; Lee, Vincent; Mitra, Indrajit; SaiGopal, T; Rarity, John; Faulkner, Grahame; O’Brien, Dominic

doi:10.1109/gcwkshps45667.2019.9024509

Cited by 2 publications

(2 citation statements)

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“…While this is not an issue for applications in network infrastructure, this presents significant issues in other applications. There exist smaller QKD transmitters (≈100 cm 3 ) [300–302] but these do not address the SWaP of the receiver section, and so limit the available topologies for implementations. None of the systems cited above were designed for space, so there can be some conclusions reached from examining them; however, focussing on systems designed for space, the lowest SWaP systems with space heritage are SOTA (1000 cm 3 , 6.2 kg, 39.5 W) [303] and SPEQS (330 cm 3 , 300 g, 2 W) [304].…”

Section: Space Quantum Communication Challengesmentioning

confidence: 99%

Advances in space quantum communications

Sidhu

Joshi

Gündoğan

et al. 2021

IET Quantum Communication

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166

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Concerted efforts are underway to establish an infrastructure for a global quantum Internet to realise a spectrum of quantum technologies. This will enable more precise sensors, secure communications, and faster data processing. Quantum communications are a front-runner with quantum networks already implemented in several metropolitan areas. A number of recent proposals have modelled the use of space segments to overcome range limitations of purely terrestrial networks. Rapid progress in the design of quantum devices have enabled their deployment in space for in-orbit demonstrations. We review developments in this emerging area of space-based quantum technologies and provide a roadmap of key milestones towards a complete, global quantum networked landscape. Small satellites hold increasing promise to provide a cost effective coverage required to realise the quantum Internet. The state of art in small satellite missions is reviewed and the most current in-field demonstrations of quantum cryptography are collated. The important challenges in space quantum technologies that must be overcome and recent efforts to mitigate their effects are summarised. A perspective on future developments that would improve the performance of space quantum communications is included. The authors conclude with a discussion on fundamental physics experiments that could take advantage of a global, space-based quantum network.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Space Quantum Communication Challengesmentioning

confidence: 99%

Advances in space quantum communications

Sidhu

Joshi

Gündoğan

et al. 2021

IET Quantum Communication

Self Cite

166

View full text Add to dashboard Cite

show abstract

“…Mismatches of the polarisation states are induced by imperfections of the components used, birefringence of the single mode fibre in the handheld and hand movements of the user. A real-time calibration and compensation scheme has been proposed for this application [13]. A simple one-time calibration at the beginning of each key exchange session proved sufficient for 15 s of operation if the handheld does not roll.…”

Section: Beam Steering Platformmentioning

confidence: 99%