Observation of Topological and Parity-dependent Phase of $m=0$ Spin States

Abstract

A Ramsey interrogation scheme was used to measure the phase shift of laser-cooled ${}^{87}$Rb clock-transition pseudospins arising as a result of a reversal of a bias magnetic field, i.e., $\text{B}\to -\text{B}$, during the interrogation. While no phase shift occurred when the reversal was sudden, the Ramsey fringes were shifted by a factor of $\pi$ when the reversal was adiabatic. We thus verified the prediction that the spin states $|F,m=0>$ acquire a purely topological and parity-dependent phase factor of $(-1{)}^F$ as a result of $\text{B}\to -\text{B}$.

arXiv comment4 pages, 4 figures

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Cited by in corpus (4)

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• Rabi oscillation induced $\pi$-phase flip in an unbalanced Ramsey atom interferometer