The quantum structure of matter grand challenge project: Large-scale 3-D solutions in relativistic quantum dynamics
- Oak Ridge National Lab., TN (United States). Physics Division
- Oak Ridge National Lab., TN (United States)
The authors describe the numerical methods used to solve the time-dependent Dirac equation on a three-dimensional Cartesian lattice. Efficient algorithms are required for computationally intensive studies of nonperturbative relativistic quantum dynamics. Discretization is achieved through the lattice basis-spline collocation method, in which quantum-state vectors and coordinate-space operators are expressed in terms of basis-spline functions on a spatial lattice. All numerical procedures reduce to a series of matrix-vector operations which they perform on the Intel iPSC/860 hypercube, making full use of parallelism. They discuss their solutions to the problems of limited node memory and node-to-node communication overhead inherent in using distributed-memory, multiple-instruction, multiple-data stream parallel computers.
- DOE Contract Number:
- AC05-84OR21400; FG05-87ER40376
- OSTI ID:
- 46205
- Report Number(s):
- CONF-931115--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS
ACTINIDES
DATA TRANSMISSION
DIRAC EQUATION
ELEMENTARY PARTICLES
FISSION
HEAVY ION REACTIONS
HIGH ENERGY PHYSICS
HYPERCUBE COMPUTERS
MEMORY MANAGEMENT
NUCLEAR PHYSICS
NUMERICAL SOLUTION
PARALLEL PROCESSING
PARTICLE PRODUCTION
QUANTUM FIELD THEORY
QUARK MATTER
THEORETICAL DATA
THREE-DIMENSIONAL CALCULATIONS
USES