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quant-ph2026
Fast convergence of propagation algorithms for open quantum systems
Giorgio Facelli, Hamza Fawzi, Omar Fawzi +3
We establish general conditions for the rapid convergence of propagation algorithms for computing expectation values of local observables in quantum many-body systems, covering bot…
quant-ph2026
Improved Adaptive Estimation of Quantum Partition Functions with Heisenberg Scaling
Yufei Wang, Daniel Stilck França, Samuel Slezak
We give quantum algorithms that estimate the log partition function of an -qubit quantum Hamiltonian to additive error with Heisenberg scaling, while minimizing calls to the…
quant-ph2026
Polynomial-time thermalization and Gibbs sampling from system-bath couplings
Samuel Slezak, Matteo Scandi, Álvaro M. Alhambra +2
Many physical phenomena, including thermalization in open quantum systems and quantum Gibbs sampling, are modeled by Lindbladians approximating a system weakly coupled to a bath. U…