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On the effective reconstruction of expectation values from ab initio quantum embedding
Max Nusspickel, Basil Ibrahim, George H. Booth
Quantum embedding is an appealing route to fragment a large interacting quantum system into several smaller auxiliary `cluster' problems to exploit the locality of the correlated p…
Full configuration interaction quantum Monte Carlo for coupled electron--boson systems and infinite spaces
Robert J. Anderson, Charles C. J. Scott, George H. Booth
We extend the scope of full configuration interaction quantum Monte Carlo (FCIQMC) to be applied to coupled fermion-boson hamiltonians, alleviating the a priori truncation in boson…
Constructing `full-frequency' spectra via moment constraints for coupled cluster Green's functions
Oliver J. Backhouse, George H. Booth
We propose an approach to build `full-frequency' quasiparticle spectra from conservation of a set of static expectation values. These expectation values define the moments of the s…