Space-Based Global Quantum Internet

Khatri, Sumeet; Brady, Anthony J.; Desporte, Renée A.; Bart, Manon P.; Dowling, Jonathan P.

doi:10.1364/fio.2019.jw3a.56

Cited by 3 publications

(6 citation statements)

References 13 publications

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“…Note that the background rate has been chosen as a fixed value while varies per second. Modelling the dynamic background photon rate requires the decay of solar irradiance, and so on [62,63]. We also find that the variation on link loss is mainly determined by the distance, since the beam diffraction is the dominant source of loss.…”

Section: Resultsmentioning

confidence: 81%

Exploiting potentialities for space-based quantum communication network: downlink quantum key distribution modelling and scheduling analysis

Wang

Chen

et al. 2023

New J. Phys.

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The goal of the space-based quantum network is to form the backbone of the quantum internet for long-distance secure data transfer, networked distributed quantum information processing, and other applications. Consider that the quantum network evolved from a recent form where a satellite performs a sequence of satellite-to-ground quantum key distribution (SatQKD) missions that allow any two ground nodes to have the symmetric encryption keys, we here develop a framework for the SatQKD downlink modelling and scheduling analysis. Incorporated with the orbital caculation and the meteorological data to downlink SatQKD modelling, the dynamic characteristics of the satellite-to-ground optical transmission could be simulated. Our work shows that the satellite downlink scheduling allows for the possibility to consider strategies for different SatQKD missions such as extending connection for distant ground nodes, prioritized delivery and promoting keys utilization, which may guide design and analysis of future missions for future satellite application.

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Section: Resultsmentioning

confidence: 81%

Exploiting potentialities for space-based quantum communication network: downlink quantum key distribution modelling and scheduling analysis

Wang

Chen

et al. 2023

New J. Phys.

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“…This will be a common feature of all sync traces shown in this paper. 1 The improvement in sync outcomes as the holdover time τ is increased for the New York-Salt Lake City ground station pair (≈ 3500 km apart) can be seen in Fig. 2.…”

Section: B Precision Shadow and Sync Tracesmentioning

confidence: 95%

“…Let these transmittance values be, respectively, where the superscripts refer to the downlink, f s refers to free-space diffraction loss, atm to atmospheric loss, L is the link distance (physical distance) between satellite and receiver (which in turn depends on the satellite altitude, h, position of the satellite in its orbit, and position of the ground station on Earth's surface), κ denotes non-ideal detection efficiencies for the onboard satellite detector array (sat) as well as the detector array at the ground station (gs), and all transmittance values are less than or equal to 1. Simple analytic formulae are used to estimate the free-space and atmospheric transmittance values in accordance with [1]. Therefore, the overall efficiencies are given as:…”

Section: Simulation Methodsmentioning

confidence: 99%

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A quantum-assisted master clock in the sky: global synchronization from satellites at sub-nanosecond precision

Haldar,

Ducoing,

Agullo

et al. 2024

Preprint

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This article develops a protocol to synchronize clocks on board a network of satellites equipped with quantum resources. We show that, in such a constellation, satellites reinforce each other's sync capabilities, forming a common clock that is more stable and precise than its constituents. We envision the resulting network as a master clock able to distribute time across the globe, providing the basis for a future quantum global navigation satellite system or a space-based quantum network. As an example of its capabilities, we show that a constellation of 50 satellites equipped with modest quantum resources, and distributed amongst 5 orbits at an altitude of 500 km, allows the synchronization of clocks spread across the globe at sub-nanosecond precision.

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“…Such a network is envisioned to feature quantum nodes that are capable of producing, detecting, or verifying quantum entanglement. A global quantum network can be more readily realized using space-based nodes [11][12][13].…”

Section: Lettermentioning

confidence: 99%

Entanglement demonstration on board a nano-satellite

Villar

Lohrmann

Bai

et al. 2020

Optica

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Global quantum networks for secure communication can be realized using large fleets of satellites distributing entangled photon pairs between ground-based nodes. Because the cost of a satellite depends on its size, the smallest satellites will be most cost-effective. This Letter describes a miniaturized, polarization entangled, photon-pair source operating on board a nano-satellite. The source violates Bell’s inequality with a Clauser–Horne–Shimony–Holt parameter of 2.60 ± 0.06 . This source can be combined with optical link technologies to enable future quantum communication nano-satellite missions.

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Space-Based Global Quantum Internet

Cited by 3 publications

References 13 publications

Exploiting potentialities for space-based quantum communication network: downlink quantum key distribution modelling and scheduling analysis

Exploiting potentialities for space-based quantum communication network: downlink quantum key distribution modelling and scheduling analysis

A quantum-assisted master clock in the sky: global synchronization from satellites at sub-nanosecond precision

Entanglement demonstration on board a nano-satellite

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