Relativistic Zitterbewegung in magnons

Magnonic analog of relativistic Zitterbewegung in an antiferromagnetic spin chain.
Weiwei Wang, Chenjie Gu, Yan Zhou, and Hans Fangohr
Phys. Rev. B 96, 024430 (2017)

(a) A positive wave packet and a negative packet that both have positive wave vector move in different directions. The amplitude $\left|\psi \right|$ is used for plotting. (b) Two positive wave packets with different wave vectors move toward each other too. (c) The normalized average position $⟨\xi ⟩$ as a function of time for the two cases.