A Note on the Construction of Trial States for the Dilute Bose Gas
arXiv:2605.06844
Abstract
We review how the local particle number cutoff introduced in [11] is used to build trial states for the dilute Bose gas that capture the substantial correlation structure of the ground state in the thermodynamic limit. In particular, we provide a simplified derivation of the Lee-Huang-Yang correction as an upper bound for the ground state energy.
Contribution to the Proceedings of QMATH16 Mathematical Results in Quantum Theory at Technical University of Munich, 1-5 September 2025