Long-lived BLOCH oscillations with bosonic sr atoms and application to gravity measurement at the micrometer scale.
作者： G. Ferrari , N. Poli , F. Sorrentino , G. M. Tino
DOI: 10.1103/PHYSREVLETT.97.060402
关键词: Bose gas 、 Physics 、 Gravitation 、 Physics beyond the Standard Model 、 Matter wave 、 Bloch oscillations 、 Ground state 、 Condensed matter physics 、 Casimir effect 、 Angular momentum
摘要: We report on the observation of Bloch oscillations unprecedented time scale several seconds. The experiment is carried out with ultracold bosonic $^{88}\mathrm{Sr}$ atoms loaded into a vertical optical standing wave. negligible atom-atom elastic cross section and zero angular momentum in ground state makes an almost ideal Bose gas, insensitive to typical mechanisms decoherence due thermalization external stray fields. small size system enables precision measurements forces at micrometer scale. This challenge physics for studies surfaces, Casimir effects, searches deviations from Newtonian gravity predicted by theories beyond standard model.
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