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Computer simulation using particles J.W Eastwood, R.W Hockney
Publisher: IOP

Astronomers using the new Atacama Large Millimeter/submillimeter Array have imaged a region around a young star where dust particles can grow by clumping together. Eastwood,Computer Simulation Using Particles, Bristol, Eng- land: IOP Publishing, 1988. BIT is based on fast summation algorithms, which eliminates the need for a fixed .. Personnel Supported During Duration of Grant. Because modern computers have to depict the real world with digital representations of numbers instead of physical analogues, to simulate the continuous passage of time they have to digitize time into small slices. This is the first time that such a dust . By using computer simulations they were able to get an understanding of what was responsible for the shape change of these particles. (Stefan Wippermann/UC Davis photo). Quantum physicists are now facing a similar situation where they cannot satisfactorily simulate the behavior of many interesting quantum systems on even the most powerful computers. Scientists have Joe Britton, at the National Institute of Standards and Technology (NIST) in Boulder, Colorado, USA, and coworkers have now demonstrated rudimentary operation of a quantum simulator with hundreds of simultaneously interacting quantum particles. Computer simulations show that when a light particle (blue wave on left) hits a crystal of a high-pressure form of silicon, it releases two electron-hole pairs (red circles/green rings), which generate electric current. Of the many varieties, the most accepted approach is Particle-In-Cell. Using an exotic form of silicon could substantially improve the efficiency of solar cells, according to computer simulations by researchers at the University of California, Davis, and in Hungary. The PI, with his collaborators, is developing an alternative approach, the Boundary In- tegral Treecode (BIT) [2] and Gridless DSMC.