M Aghaee - Department of Physics, Razi University, Kermanshah, Iran
A Rabeie - Department of Physics, Razi University, Kermanshah, Iran
M.V Takook - Department of Physics, Razi University, Kermanshah, Iran

Construction of the reduced spin and helicitydensity matrix for systems of two and three particles aredescribed by a wave packet with sharp and Gaussianmomentum distribution. The entropy for the spin andhelicity part of the systems is calculated from the viewpointof moving observers.

Entanglement Spin Helicity Entropy