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6 papers · 2 filters
Capacities of noiseless quantum channels for massive indistinguishable particles: Bosons vs. fermions
Aditi Sen De, Ujjwal Sen, Bartosz Gromek +2
We consider information transmission through a noiseless quantum channel, where the information is encoded into massive indistinguishable particles: bosons or fermions. We study th…
Elementary proof of the bound on the speed of quantum evolution
Piotr Kosinski, Magdalena Zych
An elementary proof is given of the bound on "ortogonalization time".
Coherent states of a charged particle in a uniform magnetic field
K. Kowalski, J. Rembielinski
The coherent states are constructed for a charged particle in a uniform magnetic field based on coherent states for the circular motion which have recently been introduced by the a…
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…
Capacities of Quantum Channels for Massive Bosons and Fermions
Aditi Sen De, Ujjwal Sen, Bartosz Gromek +2
We consider the capacity of classical information transfer for noiseless quantum channels carrying a finite average number of massive bosons and fermions. The maximum capacity is a…