3 papers
cond-mat.quant-gas2025
Beyond-mean-field analysis of the Townes soliton and its breathing mode
D. S. Petrov
By using the Bogoliubov perturbation theory we describe the self-bound ground state and excited breathing states of two-dimensional bosons with zero-range attractive interactio…
cond-mat.quant-gas2025
Dimer problem on a spherical surface
A. Tononi, D. S. Petrov, M. Lewenstein
We solve the problem of a dimer moving on a spherical surface and find that its binding energy and wave function are sensitive to the total angular momentum. The dimer gets squeeze…
cond-mat.quant-gas2024
Heavy-light clusters of two-dimensional fermions
J. Givois, A. Tononi, D. S. Petrov
We study binding of identical heavy fermions by a light atom in two dimensions assuming zero-range attractive heavy-light interactions. By using the mean-field theory valid for…