78 citations
5 papers
Lorentz-covariant reduced spin density matrix and EPR-Bohm correlations
P. Caban, J. Rembielinski
We show that it is possible to define a Lorentz-covariant reduced spin density matrix for massive particles. Such a matrix allows one to calculate the mean values of observables co…
Unstable particles as open quantum systems
P. Caban, J. Rembielinski, K. A. Smolinski +1
We present the probability preserving description of the decaying particle within the framework of quantum mechanics of open systems taking into account the superselection rule pro…
A note on dilaton gravity with non-smooth potentials
Christian G. Boehmer, Piotr Bronowski
Recent interest in brane world models motivates the investigation of generic first order dilaton gravity actions, with potentials having some non-smoothness. We consider two differ…
At what particle energy do extragalactic cosmic rays start to predominate?
Tadeusz Wibig, Arnold W. Wolfendale
We have argued [J. Szabelski et al. (2002)] that the well-known `ankle' in the cosmic ray energy spectrum, at logE (eV) ~ 18.7-19.0, marks the transition from mainly Galactic sourc…
Gamma-rays from cascades in close massive binaries containing energetic pulsars
A. Sierpowska, W. Bednarek
Some massive binaries should contain energetic pulsars which inject relativistic leptons from their inner magnetospheres and/or pulsar wind regions. If the binary system is compact…