Quantum Cluster Theories

Understanding High-Temperature Superconductors with Quantum Cluster Theories

Quantum cluster theories are a set of approaches for the theory of correlated and disordered lattice systems, which treat correlations within the cluster explicitly, and correlations at longer length scales either perturbatively or within a mean-field approximation. These methods become exact when the cluster size diverges, and most recover the corresponding (dynamical) mean-field approximation...

A Cluster-Based Hybrid broadcasting mechanism for Quantum Systems with Power Management and delay Constraint in the MAC sub-layer

Coupled-cluster Raman intensities: Assessment and comparison with multiconfiguration and density functional methods

An extensive study of static and dynamic Raman intensities is presented for normal vibrations of small molecules obtained with different correlated quantum chemical methods: namely, coupled-cluster, multiconfiguration self-consistent-field, and density functional theories. While this is the first systematic study of coupled-cluster ~CC! Raman intensities considering also the dispersion effect f...

A transformed framework for multireference dynamic correlation

Multireference correlation remains a driving force for the development of new quantum chemical methods. There are now many methods to describe the correlation in the active spaces with up to 50 orbitals that produce a multireference wavefunction that is formally the sum of many determinants. The remaining challenge is to efficiently describe dynamic correlation outside of the active space. Dyna...

Paired and Clustered Quantum Hall States

We briefly summarize properties of quantum Hall states with a pairing or clustering property. Their study employs a fundamental connection with parafermionic Conformal Field Theories. We report on closed form expressions for the many-body wave functions and on multiplicities of the fundamental quasi-hole excitations. 1