2 papers
quant-ph2025
Toward a Complexity Classification of High-Temperature Bosons: Computational Tractability and Power-Law Clustering
Xin-Hai Tong, Tomotaka Kuwahara
Determining when quantum many-body systems admit simple, efficiently simulable structure is a central problem. High-temperature thermal states are a natural candidate for such simp…
cond-mat.stat-mech2024
Clustering Theorem for Bose-Hubbard class Gibbs states
Xin-Hai Tong, Tomotaka Kuwahara, Zongping Gong
We establish the exponential clustering of correlation functions for the high-temperature Gibbs states of Bose-Hubbard type models. To overcome the technical difficulties arising f…