Decoherence of entangled kaons and its connection to entanglement measures

Author(s)
Reinhold Bertlmann, Katharina Durstberger, Beatrix Hiesmayr
Abstract

We study the time evolution of the entangled kaon system by considering the Liouville–von Neumann equation with an additional term which allows for decoherence. We choose, as generators of decoherence, the projectors to the two-particle eigenstates of the Hamiltonian. Then we compare this model with the data of the CPLEAR experiment and find in this way an upper bound on strength λ of the decoherence. We also relate λ to an effective decoherence parameter ζ considered previously in literature. Finally we discuss our model in the light of different measures of entanglement, i.e., von Neumann entropy S, entanglement of formation E, and concurrence C, and we relate decoherence parameter ζ to the loss of entanglement: 1-E. © 2003 The American Physical Society.

Organisation(s)
Particle Physics
Journal
Physical Review A
Volume
68
ISSN
1050-2947
DOI
https://doi.org/10.1103/PhysRevA.68.012111
Publication date
2003
Peer reviewed
Yes
Austrian Fields of Science 2012
103036 Theoretical physics
Portal url
https://ucrisportal.univie.ac.at/en/publications/decoherence-of-entangled-kaons-and-its-connection-to-entanglement-measures(382fde44-11b9-45ad-bf5d-a6274aa6652c).html