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  • 03.65.Ca  (1)
  • 21.10.−k  (1)
  • 36.40.Mr  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Truncation of time-dependent many-body theories (1990)
    Springer
    The European physical journal 336 (1990), S. 123-131 
    Details
    ISSN: 1434-601X
    Keywords: 05.45.+b ; 03.65.Ca ; 03.65.Sq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We investigate truncation schemes for the many-body dynamics of finite fermion systems beyond the time-dependent Hartree-Fock (TDHF) approximation. One approach starts from the quantum Bogolyubov-Born-Green-Kirkwood-Yvon (BBGKY-)hierarchy of equations of motion for density matrices. It is shown that simple truncation of higher correlations within this scheme is inconsistent because essential exchange correlations are lost. As an alternative, we study the (extended) exp(S) or coupled-cluster formalism. It provides a wider range of applicability. But it also runs into problems with non-unitary propagation after truncation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290612
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mean field model for relativistic heavy ion collisions (1987)
    Springer
    The European physical journal 326 (1987), S. 269-277 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Jz ; 21.30. + y ; 21.10.−k
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We take up a relativistic mean-field model consisting out of nucleons coupled to a scalar and a vector meson. We solve the corresponding time-dependent mean-field equations on a three-dimensional grid. Results for16O +16O scattering at various energies and various impact parameters show significant differences with conventional TDHF calculations. We see sidewards collective flow similar as in fluid dynamics and in experiment. We observe complete spallation and remarked oscillations of the meson fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01297581
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ionic structure and global deformation of axially symmetric simple metal clusters (1995)
    Springer
    The European physical journal 33 (1995), S. 265-279 
    Details
    ISSN: 1434-6079
    Keywords: 31.15.Ew ; 36.40.Cg ; 36.40.Mr
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The ground-state structure and shape parameters of neutral and singly charged simple metal clusters with up to 40 valence electrons have been calculated within the cylindrically averaged pesudopotential scheme (CAPS). Na and Ba have been chosen as typical monovalent and divalent metals. The obtained structures agree very well with the results of more elaborate methods. A simple growth pattern for the most stable ionic geometries is deduced. The ionic and electronic multipole moments from CAPS are very similar to those of the structure averaged jellium model (SAJM) and of the plasma model. The surface energies derived from the CAPS results agree with experimental values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437507
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    Paper (German National Licenses)
    Fulltext
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