7 citations · 18 across the 3 of their papers we have counts for
5 papers
A variational Jastrow coupled-cluster theory of quantum many-body systems
Y. Xian
We study many-body correlations in the ground states of a general quantum system of bosons or fermions by including an additional Jastrow function in our ecently proposed variation…
Excited states of quantum many-body interacting systems: A variational coupled-cluster description
Y. Xian
We extend recently proposed variational coupled-cluster method to describe excitation states of quantum many-body interacting systems. We discuss, in general terms, both quasiparti…
A variational coupled-cluster study of magnon-density-wave excitations in quantum antiferromagnets
Y. Xian
We extend recently proposed variational coupled-cluster method to describe excitation states of quantum antiferromagnetic bipartite lattices. We reproduce the spin-wave excitations…
Diagrammatic approach in the variational coupled-cluster method
Y. Xian
Recently, as demonstrated by an antiferromagnetic spin-lattice application, we have successfully extended the coupled-cluster method (CCM) to a variational formalism in which two s…
Theory of Valence-Bond Lattice on Spin Lattice
Yang XIAN
Quantum spin-lattice systems in low dimensions exhibit a variety of interesting zero-temperature phases, some of which show non-classical (i.e., non-magnetic) long-range orders, su…