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The dynamical density-matrix renormalization group (DDMRG) method is a numerical technique for calculating the zero-temperature dynamical properties in low-dimensional quantum many-body systems. For the onedimensional Hubbard model and its extensions, DDMRG allows for accurate calculations of these properties for lattices with hundreds of sites and… (More)

The Density Matrix Renormalization Group (DMRG) was developed by White [1, 2] in 1992 to overcome the problems arising in the application of real-space renormalization groups to quantum lattice many-body systems in solid-state physics. Since then the approach has been extended to a great variety of problems in all fields of physics and even in quantum… (More)

- V. Murg, F. Verstraete, R. Schneider, P. R. Nagy, Ö. Legeza
- Journal of chemical theory and computation
- 2015

We study the tree-tensor-network-state (TTNS) method with variable tensor orders for quantum chemistry. TTNS is a variational method to efficiently approximate complete active space (CAS) configuration interaction (CI) wave functions in a tensor product form. TTNS can be considered as a higher order generalization of the matrix product state (MPS) method.… (More)

- K. Thonke, M. Schirra, +6 authors R. Sauer
- Microelectronics Journal
- 2009

Cathodoluminescence spectra recorded with high spatial and wavelength resolution on tilted ZnO epitaxial layers allow to identify a very prominent emission peak at 3.314 eV as a free electron to shallow acceptor (E A % 130 meV) transition. By correlation with TEM cross-section images recorded on the same samples we can find these acceptor states to be… (More)

This paper describes the development of a multiprocessor architecture that integrates data acquisition and numerical processing for a hard real-time environment. Within s 15X19 ADC, samples have to be captured and analyzed. The first segment describes the function and architecture of an application-specific preprocessor that performs data acquisition and,… (More)

At the Department of Cardiology of the Technical University of Munich and the Deutsches Herzzentrum München cardiac disease patients are treated in close co-operation. In order to support the collaborative treatment as well as cardiological studies a distributed medical record (DMR) has been implemented on the basis of a Holter-ECG archiving and analysis… (More)

- H. Stiegler, D. Lötzerich, R. Schneider, C. Weber
- Software-Ergonomie
- 1983

- C.-D Munz, R Schneider, E Stein, U Voo, T Westermann, M Krauu
- 2007

The numerical concept realized in the the Karlsruhe Diode Code KADI2D is brieey reviewed. Several new aspects concerning the Maxwell eld solver based on high resolution nite-volume methods are presented. A new approach maintaining charge conservation numerically for the Maxwell-Lorentz equations is shortly summarized. 1. Introduction For experiments with… (More)

The Network of Noisy Leaky Integrate and Fire (NNLIF) model describes the behavior of a neural network at mesoscopic level. It is one of the simplest self-contained mean-field models considered for that purpose. Even so, to study the mathematical properties of the model some simplifications were necessary [4, 5, 6], which disregard crucial phenomena. In… (More)

- R. Schneider, I. Hoting, +7 authors J. Wolff
- GMDS
- 1996