Magic density in a self-rephasing ensemble of trapped ultracold atoms

• Verfasst von: Bonnin, Alexis [VerfasserIn]
• Titel: Magic density in a self-rephasing ensemble of trapped ultracold atoms
• Verf.angabe: A. Bonnin, C. Solaro, X. Alauze, and F. Pereira dos Santos
• E-Jahr: 2019
• Jahr: 27 February 2019
• Umfang: 7 S.
• Fussnoten: Gesehen am 08.04.2019
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2019
• Band/Heft Quelle: 99(2019,2) Artikel-Nummer 023627, 7 Seiten
• ISSN Quelle: 2469-9934
• DOI: doi:10.1103/PhysRevA.99.023627
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1662943369

Abstract

We investigate the collective spin dynamics of a self-rephasing bosonic ensemble of 87Rb trapped in a one-dimensional vertical optical lattice. We show that the combination of the frequency shifts induced by atomic interactions and inhomogeneous dephasing, together with the spin self-rephasing mechanism, leads to the existence of a “magic density”: i.e., a singular operating point where the clock transition is first-order insensitive to density fluctuations. This feature is very appealing for improving the stability of quantum sensors based on trapped pseudo-spin-1/2 ensembles. Ramsey spectroscopy of the |5s2S1/2,F=1,mF=0⟩→|5s2S1/2,F=2,mF=0⟩ hyperfine transition is in qualitative agreement with a numerical model based on coupled Bloch equations of motion for energy-dependent spin vectors.