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发表于 2025-3-28 15:49:22
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发表于 2025-3-28 21:54:21
Valentin Shehtman,Dmitrij Skvortsovvector performs a screw-like motion around the direction of its propagation (the z-direction); its projection onto a plane perpendicular to its direction of propagation describes, in general, an ellipse (Fig. 1 (b)). This ellipse degenerates to a line if the phase difference between the two constitu
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发表于 2025-3-29 00:25:42
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发表于 2025-3-29 04:28:39
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