Observation of Quantum Phase Synchronization in Spin-1 Atoms

Physical Review Letters
Arif Warsi LaskarSaikat Ghosh

Abstract

With growing interest in quantum technologies, possibilities of synchronizing quantum systems have garnered significant recent attention. In experiments with dilute ensemble of laser cooled spin-1 ^{87}Rb atoms, we observe phase difference of spin coherences to synchronize with phases of external classical fields. An initial limit-cycle state of a spin-1 atom localizes in phase space due to dark-state polaritons generated by classical two-photon tone fields. In particular, when the two couplings fields are out of phase, the limit-cycle state synchronizes only with two artificially engineered, anisotropic decay rates. Furthermore, we observe a blockade of synchronization due to quantum interference and emergence of Arnold-tongue-like features. Such anisotropic decay induced synchronization of spin-1 systems with no classical analog can provide insights in open quantum systems and find applications in synchronized quantum networks.

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Citations

Jan 21, 2021·Physical Review. E·Biswabibek BandyopadhyayTanmoy Banerjee
Jul 10, 2021·Chaos·Biswabibek Bandyopadhyay, Tanmoy Banerjee
Aug 7, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Victor Mukherjee, Uma Divakaran

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