Joachim Brand
Joachim is a theoretical and computational physicist interested in quantum many-body physics, quantum simulation, and quantum technology.
Intervention
Quantum many-body problems famously scale very badly and sometimes it cannot be avoided to work with a Hilbert space of infinite dimension. Rimu.jl can represent a Hamiltonian as a sparse matrix and implements a projector Monte Carlo method that can sample the ground and low-lying eigenstates, even when the matrix size is huge. This talk will introduce the Rimu.jl package and focus on updates since the JuliaCon24 talk. The highlights will include a new link to the quantum chemistry package ElemCo.jl and a bias-free taming of the Monte Carlo sign problem in the Fröhlich polaron model with a formally and practically infinite Hilbert space.