PROGRAPE-1: A Programmable, Multi-Purpose Computer for Many-Body Simulations

Simulations of Many-Body Quantum Systems by a Quantum Computer

We suggest that quantum computers can solve quantum many-body problems that are impracticable to solve on a classical computer. The classical many-body problem has been largely solved by the classical computer. For example the position of the planets in the solar system can now be predicted with an accuracy as great as the accuracy of the observations. On the other hand, quantum many-body probl...

A special purpose computer for ab initio molecular dynamics simulations

Electrostatically Embedded Many-Body Expansion for Simulations.

We have applied the electrostatically embedded many-body (EE-MB) method truncated at the two-body level (also called the pairwise additive EE-MB method or the EE-PA approximation) and the three-body level (called EE-3B) to calculate the gradient of the potential energy for a simulation box containing 64 water molecules. We employed the B3LYP density functional with the 6-31+G(d,p) basis set for...

Multi-purpose semi-static shift registers for digital programmable retinas

A digital programmable retina is a functional extension of a CMOS imager, in which every pixel is fitted with a tiny digital programmable processor. We actually call it a PAR, standing for Programmable Artificial Retina. From an architectural viewpoint, a PAR is an SIMD array processor with local optical input. A PAR is aimed at processing images on-site (where they are sensed) until they can b...

General-Purpose Computer Architecture Based on Fully Programmable Logic

We propose a new general-purpose computer architecture based on programmable logic. It consists of a dual-structured array of cells accommodating a fixed “built-in part” and a freely programmable “plastic part”. We call this composition the “Plastic Cell Architecture” (PCA). The built-in part with its fully connective two-dimensional mesh structure serves as a communication platform based on th...