4 papers
Entanglement-Inducing Quantum Markov Processes
J. Fransson, A. P. Sowa
We introduce a new model for a system of interacting bosons placed in an array of sites. At its core is a nonlinear, nonlocal evolution equation, which we have dubbed the Schröding…
Two-site Bose-Hubbard hopping and Schrödinger cat states
Madeline Berezowski, Artur Sowa, Jonas Fransson
The Bose-Hubbard Hamiltonian can be simplified to have only two lattice sites, in which case the system being described is referred to as a dimer. Due to its structure, the hopping…
Macroscopically distinguishable superposition in infinitely many degrees of freedom
J. Fransson, B. C. Sanders, A. P. Sowa
We investigate the concept of macroscopically distinguishable superpositions within an infinite array of boson sites. Our approach is rigorous within the frame of Hilbert space the…
Nonlocal coherent states in an infinite array of boson sites
A. Sowa, J. Fransson
A regular coherent state (CS) is a special type of quantum state for boson particles placed in a single site. The defining feature of the CS is that it is an eigenmode of the annih…