Author

G. Chan

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Preprint Oct 2026

Quasiparticle quantum simulation of materials with the Bethe-Salpeter equation

The first-principles quantum simulation of the full electronic Hamiltonian of a material model of realistic size appears daunting even in a future era of fully fault-tolerant quantum computers. In contrast, classical simulations of material excited states rely on heuristic quasiparticle frameworks, such as the GW appro...

Jie-Lun Chen, Jia-Ce Sun, G. Chan · 0 citations

Preprint Sep 2026

Stochastic Tensor Contraction for Efficient MP2 Exchange

Second-order Moller--Plesset perturbation theory (MP2) is one of the simplest correlated wave-function methods, but its conventional $O(N^5)$ cost limits its application to large systems. Stochastic tensor contraction (STC) has recently appeared as a general technique to evaluate high-order tensor contractions in quant...

Jia-Ce Sun, G. Chan · 1 citation