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  • 1
    Electronic Resource
    Electronic Resource
    Gain without inversion in a medium of 1/2→1/2 atoms (1998)
    Springer
    JETP letters 68 (1998), S. 388-393 
    Details
    ISSN: 1090-6487
    Keywords: 32.80.Bx ; 42.50.Gy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Amplification of a probe field without inversion in a medium of non-degenerate two-level atoms pumped by a circularly polarized optical field in resonance with a 1/2→1/2 atomic transition in the presence of a dc magnetic field orthogonal to the wave vector of the pump field is demonstrated. It is shown that gain without inversion is possible in strong optical and magnetic fields in the case of a pump with a finite spectral width which can be much greater than the natural width of the excited level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567878
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Invariant energy-momentum relations in macroscopic electrodynamics (1976)
    Springer
    Radiophysics and quantum electronics 19 (1976), S. 729-733 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01034242
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Kaluza-Klein or fiber bundles? (1998)
    Springer
    Journal of mathematical sciences 88 (1998), S. 249-254 
    Details
    ISSN: 1573-8795
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Two basic geometric approaches to the modern theory of gauge fields are analyzed and compared. The first approach is an extension of the Kaluza-Klein unified theory of gravity and electromagnetism (1921). The second approach generalizes Cartan's formulation (1925) of Riemannian geometry and GR which now is transformed to fiber bundle theory. The goal of this paper is to show that the above-mentioned geometric approaches to the classical gauge field theory are nonequivalent and lead to different forms of quantum gauge field theory. Bibliography:12 titles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02364986
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    To the memory of V. N. Popov (1998)
    Springer
    Journal of mathematical sciences 88 (1998), S. 114-115 
    Details
    ISSN: 1573-8795
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02364971
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    Paper (German National Licenses)
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