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  • 1
    Electronic Resource
    Electronic Resource
    Application of a time-dependent density-matrix formalism (1990)
    Springer
    The European physical journal 335 (1990), S. 153-161 
    Details
    ISSN: 1434-601X
    Keywords: 24.10.Cn ; 21.10.Re
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An extended time-dependent Hartree-Fock theory which includes the effects of nucleon-nucleon collisions is presented and applied to the small-amplitude quadrupole motions of16O and40Ca. The collision term of the theory includes not only the Born term but also higher-order terms. It is found that the higher-order terms are essential to the damping of the motions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294470
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Time-dependent density-matrix theory (1990)
    Springer
    The European physical journal 335 (1990), S. 331-340 
    Details
    ISSN: 1434-601X
    Keywords: 24.10.Cn ; 25.70.Cd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mass fluctuations in damped reactions of16O+16O are studied in an extended time-dependent Hartree-Fock theory. The theory determines the time evolution of a two-body density matrix as well as that of a one-body density matrix, providing us with a microscopic way to calculate the fluctuations of one-body quantities. The results of the theory are compared with those obtained in a transport model. It is found that the dispersions in fragment mass calculated in the two models are of the same order of magnitude and much larger than those calculated in the time-dependent Hartree-Fock theory. The differences between the microscopic theory and the transport model are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304712
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Approximate ground state of the Lipkin model hamiltonian in density-matrix formalism (1991)
    Springer
    The European physical journal 339 (1991), S. 341-348 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.−n ; 24.10.Cn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A method for finding the ground state of a many-body system, which is consistent with the truncation scheme used in the time-dependent density-matrix formalism of Wang and Cassing, is presented and applied to the Lipkin model. It is found that the method gives better ground states than the Hartree-Fock approximation. However, they significantly differ from the exact ground states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560635
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    Paper (German National Licenses)
    Fulltext
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