| ATOMIC AND MOLECULAR PHYSICS |
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Magnetic-Field Dependence of Raman Coupling Strength in Ultracold $^{40}$K Atomic Fermi Gas |
| Liang-Hui Huang1,2, Peng-Jun Wang1,2, Zeng-Ming Meng1,2, Peng Peng1,2, Liang-Chao Chen1,2, Dong-Hao Li1,2, Jing Zhang1,2** |
1State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-electronics, Shanxi University, Taiyuan 030006
2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006
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| Cite this article: |
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Liang-Hui Huang, Peng-Jun Wang, Zeng-Ming Meng et al 2016 Chin. Phys. Lett. 33 033401 |
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Abstract We experimentally demonstrate the relation of Raman coupling strength with the external bias magnetic field in degenerate Fermi gas of $^{40}$K atoms. Two Raman lasers couple two Zeeman energy levels, whose energy splitting depends on the external bias magnetic field. The Raman coupling strength is determined by measuring the Rabi oscillation frequency. The characteristics of the Rabi oscillation is to be damped after several periods due to Fermi atoms in different momentum states oscillating with different Rabi frequencies. The experimental results show that the Raman coupling strength will decrease as the external bias magnetic field increases, which is in good agreement with the theoretical prediction.
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Received: 21 November 2015
Published: 31 March 2016
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| PACS: |
34.20.Cf
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(Interatomic potentials and forces)
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67.85.Hj
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(Bose-Einstein condensates in optical potentials)
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03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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