Browsing by Subject "Electrodynamics"

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    Electromagnetically induced left-handedness in a dense gas of three-level atoms
    (The American Physical Society, 2004) Oktel, M. Ö.; Müstecaphoǧlu, Ö. E.
    Ways in which a three-level system can be used to change the frequency-dependent magnetic permeability of an atomic gas were discussed. The resulting macroscopic electrodynamics was also discussed. The two levels were separated at optical frequencies while having a nonvanishing magnetic dipole matrix element. It was found that such level splittings require large external magnetic fields.
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    SU(2)-path integral investigation of Holstein dimer
    (Elsevier Science Publishers B.V., Amsterdam, Netherlands, 2000) Hakioğlu, A. T.; Ivanov, V. A.; Zhuravlev, M. Ye.
    The SU(2) coherent state path integral is used to investigate the partition function of the Holstein dimer. This approach naturally takes into account the symmetry of the model. The ground-state energy and the number of the phonons are calculated as functions of the parameters of the Hamiltonian. The renormalizations of the phonon frequency and electron orbital energies are considered. The destruction of quasiclassical mean-field solution is discussed.