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MRA and low-separation rank approximation with applications to quantum electronics structures computations

G I Fann1, R J Harrison2 and G Beylkin3

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We describe some recent mathematical results in constructing computational methods that lead to the development of fast and accurate multiresolution numerical methods for solving problems in computational chemistry (the so-called multiresolution quantum chemistry).

Using low separation rank representations of functions and operators and representations in multiwavelet bases, we developed a multiscale solution method for integral and differential equations and integral transforms. The Poisson equation and the Schrodinger equation, the projector on the divergence free functions, provide important examples with a wide range of applications in computational chemistry, computational electromagnetic and fluid dynamics.

We have implemented these ideas that include adaptive representations of operators and functions in the multiwavelet basis and low separation rank approximation of operators and functions. These methods have been implemented into a software package called Multiresolution Adaptive Numerical Evaluation for Scientific Simulation (MADNESS).


PACS

03.67.Lx Quantum computation architectures and implementations

02.60.Lj Ordinary and partial differential equations; boundary value problems

03.65.Ge Solutions of wave equations: bound states

02.30.Uu Integral transforms

02.60.Gf Algorithms for functional approximation

02.60.Nm Integral and integrodifferential equations

MSC

35J05 Laplace equation, reduced wave equation (Helmholtz), Poisson equation (See also 31Axx, 31Bxx)

81P68 Quantum computation and quantum cryptography (See also 68Q05, 94A60)

65D15 Algorithms for functional approximation

81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other quantum-mechanical equations

47A58 Operator approximation theory

Subjects

Mathematical physics

Computational physics

Quantum information and quantum mechanics

Dates

Issue 1 (2005)



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