Emission of Spin-correlated Matter-wave Jets from Spinor Bose-Einstein Condensates

• URL: http://arxiv.org/abs/2102.07613v1
• Date: Mon, 15 Feb 2021 15:55:28 GMT
• Title: Emission of Spin-correlated Matter-wave Jets from Spinor Bose-Einstein Condensates
• Authors: Kyungtae Kim, Junhyeok Hur, SeungJung Huh, Soonwon Choi, Jae-yoon Choi
• Abstract summary: We report the observation of matter-wave jet emission in a strongly ferromagnetic spinor Bose-Einstein condensate of $7$Li atoms. The matter-wave jets of different spin states ($|F=1,m_F=pm1rangle$) can be a macroscopic Einstein-Podolsky-Rosen state with spacelike separation.
• Score: 1.8353070352474108
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report the observation of matter-wave jet emission in a strongly ferromagnetic spinor Bose-Einstein condensate of $^7$Li atoms. Directional atomic beams with $|{F=1,m_F=1}\rangle$ and $|{F=1,m_F=-1}\rangle$ spin states are generated from $|{F=1,m_F=0}\rangle$ state condensates, or vice versa. This results from collective spin-mixing scattering events, where spontaneously produced pairs of atoms with opposite momentum facilitates additional spin-mixing collisions as they pass through the condensates. The matter-wave jets of different spin states ($|{F=1,m_F=\pm1}\rangle$) can be a macroscopic Einstein-Podolsky-Rosen state with spacelike separation. Its spin-momentum correlations are studied by using the angular correlation function for each spin state. Rotating the spin axis, the inter-spin and intra-spin momentum correlation peaks display a high contrast oscillation, indicating collective coherence of the atomic ensembles. We provide numerical calculations that describe the experimental results at a quantitative level and can identify its entanglement after 100~ms of a long time-of-flight.

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