Classical and quantum frequency combs for satellite-based clock synchronization

被引:2
|
作者
Gosalia, Ronakraj K. [1 ]
Aguinaldo, Ryan [2 ]
Green, Jonathan [2 ]
Leopardi, Holly [3 ]
Brereton, Peter [3 ]
Malaney, Robert [1 ]
机构
[1] Univ New South Wales, Sydney, NSW 2052, Australia
[2] Northrop Grumman Corp, San Diego, CA 92128 USA
[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
关键词
OPTICAL LATTICE CLOCKS; MODE-LOCKED LASERS; TIME TRANSFER; TIMING JITTER; FIBER LASERS; ATOMIC CLOCK; NOISE; LINK; PERFORMANCE; ABSORPTION;
D O I
10.1063/5.0220546
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The next generation of space-based networks for communications, sensing, and navigation will contain optical clocks embedded within satellites. To fully realize the capabilities of such clocks, high-precision clock synchronization across the networks will be necessary. Current experiments have shown the potential for classical frequency combs to synchronize remote optical clocks over free space. However, these classical combs are restricted in precision to the standard quantum limit. Quantum frequency combs, however, which exhibit quantum properties such as squeezing and entanglement, provide pathways for going beyond the standard quantum limit. Here, we present our perspective on the prospects for practical clock synchronization in space using both classical and quantum frequency combs. We detail the current outcomes achievable with a classical frequency comb approach to synchronization, before quantifying the potential outcomes offered by quantum frequency combs. Challenges to be overcome in deploying frequency combs in space are presented, and the implications of almost-perfect synchronization for future space-based applications and experiments are discussed.
引用
收藏
页数:22
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