Mapping a Spin Dynamics Resonance Beyond the Single-mode Approximation in a Sodium Spinor Bose-Einstein
POSTER
Abstract
We present experiments on a resonant coupling between spin and spatial degrees of freedom beyond the single-mode approximation (SMA) during short time non-equilibrium dynamics in a sodium spin-1 Bose-Einstein Condensate. Our quench-induced spin oscillation experiments rely on microwave dressing of the F = 1 hyperfine states where F denotes the total angular momentum of the Na atoms. Our data shows a slow baseline drift of the spin oscillation when the effective quadratic Zeeman shift q is tuned via microwave dressing to certain values. The baseline drift occurring at certain values of q indicates spin dynamics beyond the SMA. Our data agrees well with recent theory, based on a q-dependent, resonant coupling between spin and spatial degrees of freedom. We further explore these effects by scanning q around the point of maximum baseline drift to map out the the width of the complete resonance phenomenon as a function of q. This research has implications for using Bose-Einstein condensates as models for quantum phase transitions and spin squeezing studies as well as for non-linear SU(1,1) interferometers.
Presenters
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Shan Zhong
The University of Oklahoma
Authors
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Shan Zhong
The University of Oklahoma
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Hio Giap Ooi
Univ of Oklahoma, The University of Oklahoma
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Sankalp Prajapati
The University of Oklahoma
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Jianwen Jie
Southern University of Science and Techn, Southern University of Science and Technology
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John E. E Moore-Furneaux
University of Oklahoma, The University of Oklahoma
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Doerte Blume
University of Oklahoma, Homer L. Dodge Department of Physics and Astronomy, Center for Quantum Research and Technology, University of Oklahoma, The University of Oklahoma, Center for Quantum Research and Technology, The University of Oklahoma, 440 W. Brooks Street, Norman, Oklahoma 73019, USA
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Arne Schwettmann
Univ of Oklahoma, The University of Oklahoma