### 24602 results

Contributors: T. Radtke, S. Fritzsche

Date: 2019-12-05

... Abstract Studies on the entanglement of n-qubit quantum systems have attracted a lot of interest during recent years. Despite the central role of entanglement in quantum information theory, however, there are still a number of open problems in the theoretical characterization of entangled systems that make symbolic and numerical simulation on n-qubit quantum registers indispensable for present-day research. To facilitate the investigation of the separability and entanglement properties of n-qubit qua... Title of program: FEYNMAN Catalogue Id: ADWE_v2_0 Nature of problem Entanglement has been identified as an essential resource in virtually all aspects of quantum information theory. Therefore, the detection and quantification of entanglement is a necessary prerequisite for many applications, such as quantum computation, communications or quantum cryptography. Up to the present, however, the multipartite entanglement of n-qubit systems has remained largely unexplored owing to the exponential growth of complexity with the number of qubits involved. Versions of this program held in the CPC repository in Mendeley Data ADWE_v1_0; FEYNMAN; 10.1016/j.cpc.2005.07.006 ADWE_v2_0; FEYNMAN; 10.1016/j.cpc.2006.03.006 ADWE_v3_0; FEYNMAN; 10.1016/j.cpc.2007.02.106 ADWE_v4_0; FEYNMAN; 10.1016/j.cpc.2008.06.007 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: M.F. Soto, R. Mirman

Date: 2019-12-05

... Title of program: ORTHNRM Catalogue Id: AAMG_v1_0 Nature of problem To check that the states produced by SYMSTATS form an orthonormal set. Versions of this program held in the CPC repository in Mendeley Data aamg_v1_0; ORTHNRM; 10.1016/0010-4655(81)90132-6 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: M.F. Soto, R. Mirman

Date: 2019-12-05

... Title of program: SYMGRPTB Catalogue Id: AAMC_v1_0 Nature of problem To find explicitly the generators (permutations), and group multiplication tables for the symmetric groups. Versions of this program held in the CPC repository in Mendeley Data aamc_v1_0; SYMGRPTB; 10.1016/0010-4655(81)90131-4 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: R.D. Kent, M. Schlesinger

Date: 2019-12-05

... Abstract Title of programs: GENDRT, DRTDIM Catalogue number: AATF Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: IBM PC, PC/XT, PC/AT; Installation: University of Windsor Operating system: MS-DOS (PC-DOS) version 2.1 or higher Programming language used: Pascal High speed storage required: GENDRT - 128 Kwords minimum, DRTDIM - 128 Kwords minimum Number of bits in a word: 16 Peripherals used: video terminal, floppy o... Title of program: GENDRT, DRTDIM Catalogue Id: AATF_v1_0 Nature of problem For the purpose of computing matrix elements of quantum mechanical operators in complex N-particle systems it is necessary that as much of each irreducible representation be stored in high-speed memory as possible inorder to achieve the highest possible rate of computations. A graph theoretic approach to the representation of N-particle systems involving arbitrary single-particle spin is presented. The method involves a generalization of a technique employed by Shavitt in developing the graphica ... Versions of this program held in the CPC repository in Mendeley Data AATF_v1_0; GENDRT, DRTDIM; 10.1016/0010-4655(87)90058-0 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: A.I. Shestakov, D.V. Anderson

Date: 2019-12-05

... Title of program: ILUCG2 Catalogue Id: ACEU_v1_0 Nature of problem Elliptic and parabolic partial differential equations which arise in plasma physics applications (as well as in others) are solved in two dimensions. Plasma diffusion, equilibria, and phase space transport (Fokker-Planck equation) have been treated by these methods. These problems share the common feature of being stiff and requiring implicit solution techniques. Generally, the resulting matrix equations are asymmetric; we solve them here with the ILUCG2 program. In a subsequent article we descr ... Versions of this program held in the CPC repository in Mendeley Data ACEU_v1_0; ILUCG2; 10.1016/0010-4655(83)90119-4 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: Evgeny Z. Liverts, Nir Barnea

Date: 2019-12-05

... Abstract A simple Mathematica (version 7) code for computing S-state energies and wave functions of two-electron (helium-like) ions is presented. The elegant technique derived from the classical papers of Pekeris is applied. The basis functions are composed of the Laguerre functions. The method is based on the perimetric coordinates and specific properties of the Laguerre polynomials. Direct solution of the generalized eigenvalues and eigenvectors problem is used, distinct from the Pekeris works. No s... Title of program: TwoElAtomSL(SH) Catalogue Id: AEHY_v2_0 Nature of problem The Schrödinger equation for atoms (ions) with more than one electron has not been solved analytically. Approximate methods must be applied in order to obtain the wave functions or other physical attributes from quantum mechanical calculations. Versions of this program held in the CPC repository in Mendeley Data AEHY_v1_0; TwoElAtomSL(SH); 10.1016/j.cpc.2010.11.031 AEHY_v2_0; TwoElAtomSL(SH); 10.1016/j.cpc.2011.11.001 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: George Marsaglia, B. Narasimhan, Arif Zaman

Date: 2019-12-05

... Abstract It is now possible to do serious scientific work on personal computers (PC's). Many simulation studies, whether exploratory or for production runs, call for random numbers. We offer here a new kind of random number generator with implementation tailored specifically for PC's using Intel 8088/8086 or 80286/80386 processors. A floating-point coprocessor is not required or even useful for the generator, although, of course, a coprocessor may help other parts of a simulation. The generator has an... Title of program: ACARRYPC Catalogue Id: ABTL_v1_0 Nature of problem Any Monte Carlo calculation requiring a uniform random number generator. Versions of this program held in the CPC repository in Mendeley Data ABTL_v1_0; ACARRYPC; 10.1016/0010-4655(90)90033-W This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: Tai An, Sa Ben-Hao

Date: 2019-12-05

... Abstract LUCIAE is a Monte Carlo program that, connected to FRITIOF, implements both the Firecracker Model (FCM), a possible mechanism for collective multi-gluon emission from the colour fields of interacting strings, and the reinteraction of the final state hadrons in relativistic heavy ion collisions. This paper includes a brief presentation of the dynamics of LUCIAE with an emphasis on the new features in this version, as well as a description of the program. Title of program: LUCIAE version 3 Catalogue Id: ADBS_v2_0 [ADJN] Nature of problem The experiments of relativistic pA and AA collisions reveal that high energy heavy-ion collisions have some features which can not be understood by the simple superposition of independent nucleon-nucleon collisions. They indicate clearly that the collective effects are important in the relativistic pA and AA collisions. Formation of a QGP is often suggested to be a candidate to account for some of these collective effects. Could we understand those new features in pA and AA collisions by convent ... Versions of this program held in the CPC repository in Mendeley Data ADBS_v1_0; LUCIAE VERSION 2; 10.1016/0010-4655(95)00066-O ADBS_v2_0; LUCIAE version 3; 10.1016/S0010-4655(98)00138-6 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: E. Fredericks, F.M. Mahomed, E. Momoniat, A. Qadir

Date: 2019-12-05

... Abstract Given a space with a metric tensor defined on it, it is easy to write down the system of geodesic equations on it by using the formula for the Christoffel symbols in terms of the metric coefficients. In this paper the inverse problem, of reconstructing the space from the geodesic equations is addressed. A procedure is developed for obtaining the metric tensor explicitly from the Christoffel symbols. The procedure is extended for determining if a second order quadratically semi-linear system c... Title of program: geodesicCOMMENTED.nb Catalogue Id: AEBA_v1_0 Nature of problem The code we have developed calculates the space when the geodesic equations are given. Versions of this program held in the CPC repository in Mendeley Data AEBA_v1_0; geodesicCOMMENTED.nb; 10.1016/j.cpc.2008.04.001 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: I. Hornyak, A.T. Kruppa

Date: 2019-12-05

... Abstract The partial wave expansion of the Coulomb-distorted plane wave is determined by the help of the complex generalized hypergeometric function 2F2(a,a;a+l+1,a-l;z). An algorithm for the calculation of 2F2(a,a;a+l+1,a-l;z) is created and it is implemented as a FORTRAN-90 code. The code is fast and its accuracy is 14 significant decimal digits. Title of program: Hyp2F2spec_v1 Catalogue Id: AEXR_v1_0 Nature of problem The partial wave expansion of the Coulomb distorted plane wave is given by a generalized hypergeometric function with special indexes. An algorithm is developed for the calculation of this function. Versions of this program held in the CPC repository in Mendeley Data AEXR_v1_0; Hyp2F2spec_v1; 10.1016/j.cpc.2015.08.018 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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