Synchronization of active atomic clocks via quantum and classical channels

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OriginalspracheEnglisch
Aufsatznummer043841
FachzeitschriftPhysical Review A
Jahrgang94
Ausgabenummer4
PublikationsstatusVeröffentlicht - 21 Okt. 2016

Abstract

Superradiant lasers based on atomic ensembles exhibiting ultranarrow optical transitions can emit light of unprecedented spectral purity and may serve as active atomic clocks. We consider two frequency-detuned active atomic clocks, which are coupled in a cascaded setup, i.e., as master and slave lasers, and study the synchronization of the slave to the master clock. In a setup where both atomic ensembles are coupled to a common cavity mode, such synchronization phenomena have been predicted by Xu et al. [M. Xu, D. A. Tieri, E. C. Fine, J. K. Thompson, and M. J. Holland, Phys. Rev. Lett. 113, 154101 (2014).PRLTAO0031-900710.1103/PhysRevLett.113.154101] and experimentally observed by Weiner et al. (J. M. Weiner, arXiv:1503.06464). Here we demonstrate that synchronization still occurs in cascaded setups but exhibits distinctly different phase diagrams. We study the characteristics of synchronization in comparison to the case of coupling through a common cavity. We also consider synchronization through a classical channel where light of the master laser is measured phase sensitively and the slave laser is injection locked by feedback and compare to the results achievable by coupling through quantum channels.

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Synchronization of active atomic clocks via quantum and classical channels. / Roth, Alexander; Hammerer, Klemens.
in: Physical Review A, Jahrgang 94, Nr. 4, 043841, 21.10.2016.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Roth A, Hammerer K. Synchronization of active atomic clocks via quantum and classical channels. Physical Review A. 2016 Okt 21;94(4):043841. doi: 10.1103/PhysRevA.94.043841
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