3 papers
quant-ph2026
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…
quant-ph2025
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…
quant-ph2024
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…