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arXiv · 2105.00148

Induced Quantized Spin Current in Vacuum

Chong-Sun Chu·Chun-Hei Leung
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Abstract

We uncover a fundamental effect of the QED vacuum in an external electromagnetic (EM) field. We show that the quantized vacuum of electrons is spin polarized by the EM field and manifests as a vacuum spin current. An experiment is proposed to measure the spin torque exerted by the spin current by measuring the twisted angle of the director axis of a nematic liquid crystal.

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Chong-Sun Chu, Chun-Hei Leung. 2021-09-17. Induced Quantized Spin Current in Vacuum. https://doi.org/10.1103/physrevlett.127.111601

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