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 $\text{B}\to -\text{B}$.

4 pages, 4 figures

References in corpus (1)

• Entanglement of orbital angular momentum states between an ensemble of cold atoms and a photon

Cited by in corpus (1)

• Inhomogeneous Light Shift Effects on Atomic Quantum State Evolution in Non-Destructive Measurements