Cherenkov radiation of superluminal particles
- 3 October 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 66 (4), 042102
- https://doi.org/10.1103/physreva.66.042102
Abstract
Any charged particle moving faster than light through a medium emits Cherenkov radiation. We show that charged particles moving faster than light through the vacuum emit Cherenkov radiation. How can a particle move faster than light? The weak speed of a charged particle can exceed the speed of light. By definition, the weak velocity is where is the velocity operator and and are, respectively, the states of a particle before and after a velocity measurement. We discuss the consistency of weak values and show that superluminal weak speed is consistent with relativistic causality.
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