Superior atomic coherence time controlled by crystal phase transition and optical dressing.
Opt Lett
; 47(9): 2310-2313, 2022 May 01.
Article
en En
| MEDLINE
| ID: mdl-35486787
We compare the atomic coherence time of doped ion crystals, i.e., BiPO4: Eu3+, YPO4: Eu3+, YPO4: Pr3+, and Y2SiO5: Pr3 + crystals. Such atomic coherence time is controlled by crystal field splitting (CF-splitting) and optical (photon and phonon) dressing. Compared with the other doped ion crystals, BiPO4: Eu3+ exhibits the longest coherence time. By controlling thermal phonon, phase-transition phonon, broadband or narrowband excitation, and fluorescence (FL) or spontaneous four-wave-mixing ratio (S-FWM), a superior atomic coherence time of up to 10 ± 0.6â
ms is achieved in the pure hexagonal (0.5:1) phase of BiPO4: Eu3+. Furthermore, the relationship between TAT-splitting and spectral Autler-Townes (SAT)-splitting was investigated. This superior atomic coherence time has potential applications in quantum memory devices.
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Opt Lett
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2022
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Article