Entanglement-based quantum clock synchronization

Ilo-Okeke, Ebubechukwu O.; Tessler, Louis; Dowling, Jonathan P.; Byrnes, Tim

doi:10.1063/5.0011396

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…We also point the readers to other proposals for QCS, i.e., the use of quantum resources to synchronize clocks in Refs. [22][23][24][25][26][27][28]. Proposals of quantum network of clocks made in Refs.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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show abstract

“…Quantum networks are supported for creating, transmitting, and processing quantum information [ 1 , 2 , 3 ]. The vital function of quantum networks is to establish remote entanglement connections, which supports plenty of important applications beyond the reach of classical networks [ 4 , 5 ], such as highly secure communication [ 6 , 7 , 8 , 9 , 10 , 11 ], distributed quantum computing [ 12 , 13 , 14 ], remote quantum clock synchronization [ 15 , 16 , 17 ], and distributed quantum sensing [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

First Request First Service Entanglement Routing Scheme for Quantum Networks

Tang

Han

et al. 2022

Entropy

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Quantum networks enable many applications beyond the reach of classical networks by supporting the establishment of long-distance entanglement connections, and are already stepped into the entanglement distribution network stage. The entanglement routing with active wavelength multiplexing schemes is urgently required for satisfying the dynamic connection demands of paired users in large-scale quantum networks. In this article, the entanglement distribution network is modeled into a directed graph, where the internal connection loss among all ports within a node is considered for each supported wavelength channel, which is quite different to classical network graphs. Afterwards, we propose a novel first request first service (FRFS) entanglement routing scheme, which performs the modified Dijkstra algorithm to find out the lowest loss path from the entangled photon source to each paired user in order. Evaluation results show that the proposed FRFS entanglement routing scheme can be applied to large-scale and dynamic topology quantum networks.

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