43 citations · 188 across the 33 of their papers we have counts for
9 papers · 2 filters
Theoretical evidence for the superluminality of evanescent modes
Zhi-Yong Wang, Cai-Dong Xiong
Though both theoretical and experimental investigations have revealed the superluminal behavior of evanescent electromagnetic waves, there are many disputes about the physical mean…
Zitterbewegung at the level of quantum field theory
Zhi-Yong Wang, Cai-Dong Xiong
Traditionally, the zitterbewegung (ZB) of the Dirac electron has just been studied at the level of quantum mechanics. Seeing that the fact that an old interest in ZB has recently b…
Alternative perspective on photonic tunneling
Zhi-Yong Wang, Cai-Dong Xiong, Bing He
A relativistic quantum-mechanical description of guided waves is given, based on which we present an alternative way to describe and interpret the propagation of electromagnetic wa…
Field-theoretical space-time position operator of the Dirac electron
Zhi-Yong Wang, Cai-Dong Xiong, Bing He
A field-theoretical space-time position operator can be properly introduced for the Dirac field, it plays the role of a generalized Noether charge associated with a local symmetry,…
How to Introduce Time Operator
Zhi-Yong Wang, Cai-Dong Xiong
Time operator can be introduced by three different approaches: by pertaining it to dynamical variables; by quantizing the classical expression of time; taken as the restriction of…
Arrival Time in Relativistic Quantum Mechanics
Zhi-Yong Wang, Cai-Dong Xiong
Relativistic free-motion time-of-arrival theory for massive spin-1/2 particles is systematically developed. Contrary to the nonrelativistic time-of-arrival operator studied thoroug…