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  • 1
    Electronic Resource
    Electronic Resource
    Dynamical tunneling through a chaotic region (1995)
    Springer
    The European physical journal 35 (1995), S. 247-256 
    Details
    ISSN: 1434-6079
    Keywords: 03.65.-w ; 05.45.+b ; 33.80.b
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that a non-vibrating diatomic molecule (i.e. a rigid rotor) in the presence of a strong laser field changes its hindered rotational motion (which on the average is in resonance with the oscillating time dependent field) from anti-clockwise to clockwise (hindered) rotational motion. This transition is classically forbidden and is another example of a quantum mechanical tunneling phenomenon occurring due to the time-reversal symmetry of the Hamiltonian. Classically, the two stable rotational modes are separated by an extended chaotic region in phase space. The Husimi representation of the quasienergy states of the time-periodic quantum system enables us to localize wave packets inside the classical stability islands. The effect of the field and the molecular parameters on the perioid of this oscillation is obtained from the quasienergy splittings without the need to carry out long time dependent computations. An analytical analysis of the dynamical tunneling using an extended version of the (t,t′) formalism recently developed (J. Chem. Phys.99, 4590 (1993)) is in remarkable agreement with the numerical results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01745527
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Classical and quantum chaos in molecular rotational excitation by ac electric fields (1994)
    Springer
    The European physical journal 29 (1994), S. 125-138 
    Details
    ISSN: 1434-6079
    Keywords: 03.65.−w ; 05.45.+b ; 33.80.Be
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The interaction of diatomic molecules with an ac electric field is described by a periodically driven rigid rotor model Hamiltonian. Numerical studies of the classical and quantum dynamics reveal a remarkably close correspondence between classically chaotic dynamics and quantum time evolution. Unlike the periodically kicked rotor all the quasienergy states located in the (bounded) chaotic region in phase space are extended states. Expanded in the free rotor basis, their coefficients fullfill the statistical predictions for random vectors. Consequently, even in off resonance condition the probability for transfering angular momentum to the diatomic molecule is large and eventually the firstj m excited rotational states will be “democratically” populated. The value ofj m is determined by the bounded chaotic region in phase space. The rotational occupation probability shows an erratic behavior with fluctuations following the statistical predictions for random quantum states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437760
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  • 3
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    Resonant Auger Decay of Molecules in Intense X-Ray Laser Fields: Light-Induced Strong Nonadiabatic Effects (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-03-22
    Description: Author(s): Lorenz S. Cederbaum, Ying-Chih Chiang, Philipp V. Demekhin, and Nimrod Moiseyev The resonant Auger process is studied in intense x-ray laser fields. It is shown that the dressing of the initial and decaying states by the field leads to coupled complex potential surfaces which, even for diatomic molecules, possess intersections at which the nonadiabatic couplings are singular. H... [Phys. Rev. Lett. 106, 123001] Published Mon Mar 21, 2011
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Linear Stark Effect for a Sulfur Atom in Strong High-Frequency Laser Fields (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-06-19
    Description: Author(s): P. Balanarayan and Nimrod Moiseyev Current trends in laser technology have reached the regime of studying atoms stabilized against ionization, going beyond the perturbation theory. In this work, properties of a laser-dressed sulfur atom are examined in this stabilization regime. The electronic structure of a sulfur atom changes drama... [Phys. Rev. Lett. 110, 253001] Published Tue Jun 18, 2013
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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