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 [Formula Presented] is [Formula Presented] where [Formula Presented] is the velocity operator and [Formula Presented] and [Formula Presented] 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. 5555 2002 The American Physical Society.
Original language | English |
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Pages (from-to) | 7 |
Number of pages | 1 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 66 |
Issue number | 4 |
DOIs | |
State | Published - 1 Jan 2002 |
Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics