Spontaneous generation of spin current from the vacuum by strong electric fields
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Abstract We discuss spontaneous spin current generation from the vacuum by strong electric fields as a result of interplay between the Schwinger mechanism and a spin–orbit coupling. By considering a homogeneous slow strong electric field superimposed by a fast weak transverse electric field, we explicitly evaluate the vacuum expectation value of a spin current (the Bargmann–Wigner spin current) by numerically solving the Dirac equation. We show that a non-vanishing spin current polarized in the direction perpendicular to the electric fields flows mostly in the longitudinal direction. We also find that a relativistic effect due to helicity conservation affects the direction/polarization of a spin current.
2015 ◽
Vol 756
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pp. 486-490
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2021 ◽
Vol 34
(2)
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pp. 187-201
2010 ◽
Vol 664
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pp. 286-296
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2011 ◽
Vol 03
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pp. 58-64
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2013 ◽
Vol 25
(4)
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pp. 650-656
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