Asher Peres, Petra F. Scudo, Daniel R. Terno
Published 2002-03-07, updated 2002-05-24Version 2
We consider a single free spin 1/2 particle. The reduced density matrix for its spin is not covariant under Lorentz transformations. The spin entropy is not a relativistic scalar and has no invariant meaning.
Comments: final version
Journal: Phys.Rev.Lett.88:230402,2002
Comment on "Quantum entropy and special relativity" [by A. Peres, P. F. Scudo, and D. R. Terno, Phys. Rev. Lett. 88, 230402 (2002)]
Inequalities for Quantum Entropy: A Review with Conditions for Equality
Reduced density matrix and entanglement Hamiltonian for a free real scalar field on an interval
