A quantum network of clocks

P. Kómár; E.M. Kessler; M. Bishof; J. Ye; L. Jiang; Anders Søndberg Sørensen

doi:10.1038/nphys3000

A quantum network of clocks

P. Kómár, E.M. Kessler, M. Bishof, J. Ye, L. Jiang, Anders Søndberg Sørensen

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221 Citations (Scopus)

Abstract

The development of precise atomic clocks plays an increasingly important role in modern society. Shared timing information constitutes a key resource for navigation with a direct correspondence between timing accuracy and precision in applications such as the Global Positioning System. By combining precision metrology and quantum networks, we propose a quantum, cooperative protocol for operating a network of geographically remote optical atomic clocks. Using nonlocal entangled states, we demonstrate an optimal utilization of global resources, and show that such a network can be operated near the fundamental precision limit set by quantum theory. Furthermore, the internal structure of the network, combined with quantum communication techniques, guarantees security both from internal and external threats. Realization of such a global quantum network of clocks may allow construction of a real-time single international time scale (world clock) with unprecedented stability and accuracy.

Original language	English
Journal	Nature Physics
Volume	10
Pages (from-to)	582-587
ISSN	1745-2473
DOIs	https://doi.org/10.1038/nphys3000
Publication status	Published - Aug 2014

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title = "A quantum network of clocks",

abstract = "The development of precise atomic clocks plays an increasingly important role in modern society. Shared timing information constitutes a key resource for navigation with a direct correspondence between timing accuracy and precision in applications such as the Global Positioning System. By combining precision metrology and quantum networks, we propose a quantum, cooperative protocol for operating a network of geographically remote optical atomic clocks. Using nonlocal entangled states, we demonstrate an optimal utilization of global resources, and show that such a network can be operated near the fundamental precision limit set by quantum theory. Furthermore, the internal structure of the network, combined with quantum communication techniques, guarantees security both from internal and external threats. Realization of such a global quantum network of clocks may allow construction of a real-time single international time scale (world clock) with unprecedented stability and accuracy.",

author = "P. K{\'o}m{\'a}r and E.M. Kessler and M. Bishof and J. Ye and L. Jiang and S{\o}rensen, {Anders S{\o}ndberg}",

year = "2014",

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T1 - A quantum network of clocks

AU - Kómár, P.

AU - Kessler, E.M.

AU - Bishof, M.

AU - Ye, J.

AU - Jiang, L.

AU - Sørensen, Anders Søndberg

PY - 2014/8

Y1 - 2014/8

N2 - The development of precise atomic clocks plays an increasingly important role in modern society. Shared timing information constitutes a key resource for navigation with a direct correspondence between timing accuracy and precision in applications such as the Global Positioning System. By combining precision metrology and quantum networks, we propose a quantum, cooperative protocol for operating a network of geographically remote optical atomic clocks. Using nonlocal entangled states, we demonstrate an optimal utilization of global resources, and show that such a network can be operated near the fundamental precision limit set by quantum theory. Furthermore, the internal structure of the network, combined with quantum communication techniques, guarantees security both from internal and external threats. Realization of such a global quantum network of clocks may allow construction of a real-time single international time scale (world clock) with unprecedented stability and accuracy.

AB - The development of precise atomic clocks plays an increasingly important role in modern society. Shared timing information constitutes a key resource for navigation with a direct correspondence between timing accuracy and precision in applications such as the Global Positioning System. By combining precision metrology and quantum networks, we propose a quantum, cooperative protocol for operating a network of geographically remote optical atomic clocks. Using nonlocal entangled states, we demonstrate an optimal utilization of global resources, and show that such a network can be operated near the fundamental precision limit set by quantum theory. Furthermore, the internal structure of the network, combined with quantum communication techniques, guarantees security both from internal and external threats. Realization of such a global quantum network of clocks may allow construction of a real-time single international time scale (world clock) with unprecedented stability and accuracy.

U2 - 10.1038/nphys3000

DO - 10.1038/nphys3000

M3 - Journal article

SN - 1745-2473

VL - 10

SP - 582

EP - 587

JO - Nature Physics

JF - Nature Physics

ER -

A quantum network of clocks

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