1203.3147 (Tiago Debarba et al.)

Quantum state of a free spin-1/2 particle and the inextricable
dependence of spin and momentum under Lorentz transformations    [PDF]

Tiago Debarba, Reinaldo O. Vianna

We revise the Dirac equation for a free particle and investigate Lorentz transformations on spinors. We show how the spin quantization axis changes under Lorentz transformations, and conclude for the invariance of the entanglement.

View original: http://arxiv.org/abs/1203.3147