Bulletin of the American Physical Society

Spin-orbit coupling effect on the 2$^{3}\Pi $ state of $^{39}$K$^{85}$Rb

Jin‐Tae Kim, A. V. Stolyarov, William C. Stwalley

Published Jun 4, 2013• 0 citations

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Bulletin of the American Physical Society

Spin-orbit coupling effect on the 2$^{3}\Pi $ state of $^{39}$ K $^{85}$ RbSpin-orbit coupling effect on the 2$^{3}\Pi $ state of $^{39}$K$^{85}$Rb

Jin‐Tae Kim, A. V. Stolyarov, William C. Stwalley

Published Jun 4, 2013• 0 citations

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We report the observation of synthesized spin-orbit coupling (SOC) for ultracold spin-1 (87)Rb atoms. Different from earlier experiments where a one dimensional (1D) atomic SOC of pseudo-spin-1/2 is synthesized with Raman laser fields, the scheme we demonstrate employs a gradient magnetic field (GMF) and ground-state atoms, thus is immune to atomic spontaneous emission. The strength of SOC we realize can be tuned by changing the modulation amplitude of the GMF, and the effect of the SOC is confirmed through the studies of: 1) the collective dipole oscillation of an atomic condensate in a harmonic trap after the synthesized SOC is abruptly turned on; and 2) the minimum energy state at a finite adiabatically adjusted momentum when SOC strength is slowly ramped up. The condensate coherence is found to remain very good after driven by modulating GMFs. Our scheme presents an alternative means for studying interacting many-body systems with synthesized SOC.We report the observation of synthesized spin-orbit coupling (SOC) for ultracold spin-1 (87)Rb atoms. Different from earlier experiments where a one dimensional (1D) atomic SOC of pseudo-spin-1/2 is synthesized with Raman laser fields, the scheme we demonstrate employs a gradient magnetic field (GMF) and ground-state atoms, thus is immune to atomic spontaneous emission. The strength of SOC we realize can be tuned by changing the modulation amplitude of the GMF, and the effect of the SOC is confirmed through the studies of: 1) the collective dipole oscillation of an atomic condensate in a harmonic trap after the synthesized SOC is abruptly turned on; and 2) the minimum energy state at a finite adiabatically adjusted momentum when SOC strength is slowly ramped up. The condensate coherence is found to remain very good after driven by modulating GMFs. Our scheme presents an alternative means for studying interacting many-body systems with synthesized SOC.

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Spin-orbit coupling effect on the 2$^{3}\Pi $ state of

^{39}

^{85}

Spin-orbit coupling effect in the low-lying states of Rb

_{2}

, Cs

_{2}

and RbCs molecules

Spin-orbit coupling of the NaK

3^{3}\Pi

and

3^{1}\Pi

states: Determination of the coupling constant and observation of quantum interference effects

The large spin-orbit interaction in Rb and Cs strongly couples states of different

|{m}_{l}|

during the passage from low to high field during the electric field ionization of excited states. The result of this is that the technically accessible rise times which yield very selective ionization of Na yield much lower selectivity for Rb and Cs.