Dissociation of Feshbach molecules via spin-orbit coupling in ultracold Fermi gases

Lianghui Huang, Pengjun Wang, Peng Peng, Zengming Meng, Liangchao Chen, Peng Zhang, and Jing Zhang,

We study the dissociation of Feshbach molecules in ultracold Fermi gases with spin-orbit (SO) coupling. Since SO coupling can induce a quantum transition between Feshbach molecules and the fully polarized Fermi gas, the Feshbach molecules can be dissociated by the SO coupling. We experimentally realize this type of dissociation in ultracold gases of 40K atoms with SO coupling created by Raman beams...

Physical Review A 91, 041604(R) (2015)

Radio-frequency spectrum of the Feshbach molecular state to deeply bound molecular states in ultracold 40K Fermi gases

Lianghui Huang, Pengjun Wang, B P Ruzic, Zhengkun Fu, Zengming Meng, Peng Peng, J L Bohn and Jing Zhang

Spectroscopic measurements are made and obtained for three molecular levels within 50 MHzof the atomic continuum, along with their variation of magnetic field in ultracold 40KFermi gases.Weuse spectroscopic measurements to modify the scattering properties near magnetic Fano–Feshbach resonances with a radio-frequency (RF) field by measuring the loss profile versus magnetic field...

New Journal of Physics 17,033013(2015)

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Production of Feshbach molecules induced by spin–orbit coupling in Fermi gases

Zhengkun Fu, Lianghui Huang, Zengming Meng, Pengjun Wang, Long Zhang,Shizhong Zhang, Hui Zhai, Peng Zhang,and Jing Zhang

In this work we demonstrate a dynamic process in which SO coupling can coherently produce swave Feshbach molecules from a fully polarized Fermi gas, and can induce a coherent oscillation between Feshbach molecules and spin polarized gas. For comparison, we also show that such phenom- ena are absent if the inter-component coupling is momentum-independent....

Nature Physics 10, 110-115 (2014).     News and views

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Optical control of a magnetic Feshbach resonance in ultracold Fermi gas

Zhengkun Fu, Pengjun Wang, Lianghui Huang, Zengming Meng, Hui Hu, and Jing Zhang

We use laser light near-resonant with a molecular bound-to-bound transition to control a magnetic Feshbach resonance in ultracold Fermi gases of ⁴⁰K atoms. The spectrum of excited molecular states is measured by applying a laser field that couples the ground Feshbach molecular state to electronically excited molecular states. ...

Phys. Rev. A 88, 04160(R) (2013)

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Radio-frequency spectroscopy of a strongly interacting spin-orbit-coupled Fermi gas

Zhengkun Fu, Lianghui Huang,Zengming Meng, Pengjun Wang, Xia-Ji Liu, Han Pu,Hui Hu, and Jing Zhang

We investigate experimentally and theoretically radio-frequency spectroscopy and pairing of a spin-orbitcoupled Fermi gas of ⁴⁰K atoms near a Feshbach resonance at B0 = 202.2 G. Experimentally, the integrated spectroscopy is measured, showing characteristic blue and red shifts in the atomic and molecular responses, respectively, with increasing spin-orbit coupling....

Phys. Rev. A 87, 053619 (2013)

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