EQSE Diagonalization of the Hubbard Model

The application of enhanced quasi-sparse eigenvector methods (EQSE) to the Hubbard model is attempted. The ground state energy for the 4x4 Hubbard model is calculated with a relatively small set of basis vectors. The results agree to high precision with the exact answer. For the 8x8 case, exact answers are not available but a simple first order correction to the quasi-sparse eigenvector (QSE) result is presented.Comment: 5 pages, to appear in the proceedings of the International Light-Cone Meeting on Non-Perturbative QCD and Hadron Phenomenology, Heidelberg, June 200

Study of Pioneer spacecraft oscillator stability Final report

Pioneer spacecraft oscillator stability studies for telemetry link performance optimizatio

The Development of Contact Period Archaeology in Southern New England and Long Island: From Gee Whiz! to Say What?

It seems that contemporary archaeologists of the Contact Period continue a long tradition of uncritical acceptance of the written word as God\u27s truth, to be tested against or to inform the incomplete and necessarily biased archaeological record. When documentary history is available, have archaeologists really progessed so little- from excited discoveries of the antiquarians ( gee whiz ) to mere confirmation of written accounts ( so what )? No. This paper argues that archaeologists, working as anthropologists and in conjunction with historians, have been producing new, more critical social analyses of the 17th-century culture contact situation in New England

Has Historical Archaeology Survived the Bicentennial?: An Inquiry into the Development of Historical Archaeology in the United States

No abstract available at this time

Free-stream disturbances, continuous eigenfunctions, boundary-layer instability and transition

A rational foundation is provided for the application of the linear stability theory of parallel shear flows to transition prediction. An explicit method is given for carrying out the necessary calculations. The expansions are shown to be complete. Sample calculations show that a typical boundary layer is very sensitive to vorticity disturbance in the inner boundary layer near the critical layer. Vorticity disturbances three or four boundary layer thicknesses above the boundary are nearly uncoupled from the boundary layer, in that the amplitudes of the discrete Tollmein-Schlichting waves are an extremely small fraction of the amplitude of the disturbance

The diagonalization of quantum field Hamiltonians

We introduce a new diagonalization method called quasi-sparse eigenvector diagonalization which finds the most important basis vectors of the low energy eigenstates of a quantum Hamiltonian. It can operate using any basis, either orthogonal or non-orthogonal, and any sparse Hamiltonian, either Hermitian, non-Hermitian, finite-dimensional, or infinite-dimensional. The method is part of a new computational approach which combines both diagonalization and Monte Carlo techniques.Comment: 12 pages, 8 figures, new material adde

The Ceramics from the Weeksville Excavations, Brooklyn, New York

No abstract is available at this time