Lorentz Invariant Quantum Concurrence for SU(2) x SU(2) spin-parity states

Alex E. Bernardini, Victor A. S. V. Bittencourt, Massimo Blasone

The quantum concurrence of $SU(2)\otimes SU(2)$ spin-parity states is shown to be invariant under $SO(1,3)$ Lorentz boosts and $O(3)$ rotations when the density matrices are const…