Double time window targeting technique: Real-time DMRG dynamics in the Pariser-Parr-Pople model

A Fortran 90 Hartree-Fock program for one-dimensional periodic π-conjugated systems using Pariser-Parr-Pople model

Pariser-Parr-Pople (P-P-P) model Hamiltonian is employed frequently to study the electronic structure and optical properties of π-conjugated systems. In this paper we describe a Fortran 90 computer program which uses the P-P-P model Hamiltonian to solve the Hartree-Fock (HF) equation for infinitely long, onedimensional, periodic, π-electron systems. The code is capable of computing the band str...

The Watching Window: A Reactive Real-time Model-Viewer

We are presenting an unencumbered virtual reality system called the “Watching Window”. This is robust and easy for a subject to use and cost effective compared to other Virtual Reality model viewing systems. The interactivity of the system is demonstrated though the implementation of a virtual pottery simulation. The system involves a subject who can move about within a large restricted area an...

Methods for Time Dependence in DMRG

A major advance in density-matrix renormalization group (DMRG) calculations has been achieved by the invention of highly efficient DMRG techniques for the simulation of realtime dynamics of strongly correlated quantum systems in one dimension. Starting from established linear-response techniques in DMRG and early attempts at real-time dynamics, we go on to review two current methods which both ...

Dynamics of a discrete-time plant-herbivore model

Improvement of the Analytical Queries Response Time in Real-Time Data Warehouse using Materialized Views Concatenation

A real-time data warehouse is a collection of recent and hierarchical data that is used for managers’ decision-making by creating online analytical queries. The volume of data collected from data sources and entered into the real-time data warehouse is constantly increasing. Moreover, as the volume of input data to the real time data warehouse increases, the interference between online loading ...