Author(s): Tu Hong, Kun Chen, and Xiao Yan Xu We present a finite-temperature canonical-ensemble determinant quantum Monte Carlo algorithm that enforces an exact fermion number and enables numerically stable simulations of correlated lattice fermions. We propose a stabilized QR update that reduces the computational complexity from standard cubi… [Phys. Rev. Lett. 137, 176504] Published Wed Oct 21, 2026