naa a22 4500 510767761 CHVBK 20180411083202.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s12043-013-0589-1 doi (NATIONALLICENCE)springer-10.1007/s12043-013-0589-1 Spin-momenta entanglement in moving frames: Properties of von Neumann entropy [Elektronische Daten] [S RASTGOO, M GOLSHAN] The fact that spin-momentum of massive particles become entangled (disentangled) as seen by moving observers, is used to investigate the properties of von Neumann entropy, as a measure of spin-momentum entanglement. To do so, we partition the total Hilbert space into momentum and spin subspaces so that the entanglement occurs between total spin states and total momenta of two spin- $\frac{1}{2}$ particles. Assuming that the occurrence of spin-momentum states is determined by Gaussian probability distributions, we show that the degree of entanglement ascends for small rapidities, reaches a maximum and diminishes at high rapidity. We further report how the characteristics of this behaviour vary as the widths of distributions change. In particular, a separable state, resulting from equal distribution widths, indeed becomes entangled in moving frames. Indian Academy of Sciences, 2013 Relativistic entanglement nationallicence reduced von Neumann entropy nationallicence Gaussian distributions nationallicence RASTGOO S. Physics Department, College of Sciences, Shiraz University, 71454, Shiraz, Iran aut GOLSHAN M. Physics Department, College of Sciences, Shiraz University, 71454, Shiraz, Iran aut Pramana Springer India 81/3(2013-09-01), 385-393 0304-4289 81:3<385 2013 81 12043 https://doi.org/10.1007/s12043-013-0589-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12043-013-0589-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- RASTGOO S. Physics Department, College of Sciences, Shiraz University, 71454, Shiraz, Iran aut NATIONALLICENCE 700 1- GOLSHAN M. Physics Department, College of Sciences, Shiraz University, 71454, Shiraz, Iran aut NATIONALLICENCE 773 0- Pramana Springer India 81/3(2013-09-01), 385-393 0304-4289 81:3<385 2013 81 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer