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  • Articles: DFG German National Licenses  (4)
  • 1985-1989  (4)
  • 1985  (4)
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  • Articles: DFG German National Licenses  (4)
Material
Years
  • 1985-1989  (4)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Artifacts in the adiabatic approximation (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 3207-3213 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Generally, the adiabatic approximation is defined via a projection onto an adiabatically moving electronic base. The Hamiltonian then is separated into three constituents ("adiabatic,'' "diagonal-nonadiabatic,'' "nondiagonal-nonadiabatic''). A model system is considered for which the correct zero-order eigenfunctions are known. It is shown that with these any single of the three Hamiltonian constituents yields diverging expectation values; only their sum yields convergence. From this the conclusion seems stringent that any result pertaining to electronic transitions, which is based on the adiabatic approximation, is an artifact.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448219
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structure of tri(2H)aqua(N-methyliminodiacetato)nickel(II) (2H)monohydrate, [Ni(C5H7NO4)(D2O)3].D2O (1985)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 669-671 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270185005054
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Diagonalization of the Rabi Hamiltonian by means of a unitary transformation (1985)
    Springer
    The European physical journal 58 (1985), S. 255-258 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A unitary transformation is derived which diagonalizes the Rabi Hamiltonian. While the solution of this diagonalization problem by standard methods has long been known, it is found that the unitary operator is of a form which has previously not been used in the connexion with spin-boson problems. The transformed Hamiltonian as well as some other characteristic transformed operators are calculated. A comparison is made between the exact unitary operator and a weak coupling transformation which is equivalent to second order perturbation theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01309258
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Exact hierarchical solution of the damped oscillator problem (1985)
    Springer
    The European physical journal 60 (1985), S. 415-421 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract As a alternative to other exact approaches we present a procedure, in which the eigenvectors of a coupled oscillatory system are calculated in a hierarchically exact (N→∞) manner. In the system a single oscillator is coupled to a dense sequence of background oscillators, which among themselves are not mutually coupled (Oscillatory Fano problem). The eigenvectors beeing known, all decay laws become computable. Two of them are given. It is strongly emphasized thatquite different decay laws evolve fordifferent initial conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304463
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    Paper (German National Licenses)
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