Browsing by Subject "Quantum multipole radiation"

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    Quantum properties of multipole radiation
    (2002) Soykal, Öney Orhunç
    In this study, multipole expansion of quantum electromagnetic radiation is constructed and quantized by canonical transformation with increasing demand of some modern research areas of physics such as entanglement of the orbital angular momentum states, novel experiments with trapped atoms, and the atomic and molecular transitions with given angular momentum. Also, the SU(2) invariance of quantum field and the rotational symmetry of vacuum noise of polarization with respect to source location are proved. It is shown that, at any point we can construct a proper frame in which the description of polarization is reduced to a conventional (2 × 2) polarization matrix. And peculiarities of electric and magnetic-type zero-point oscillations were examined, and as a result it is shown that the monochromatic zeropoint oscillations of all types and modes, have constant level in the volume of quantization. Finally, the complete local representation of photon operators, which correspond to the states of photons with given projection of angular momentum at any point, is constructed for the possible utility of near-field optics.
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    Spatial properties of quantum multipole radiation
    (2000) Can, Muhammet Ali
    Complete quantum mechanical treatment of multipole radiation is constructed. Vacuum noise of polarization for transversally and longitudirudly polcirized fields is discussed for different total angular momentum values due to the presence of quantum localized sources. It is shown that the spatial properties of the multipole vacuum noise are independent of the type of the radiation, either electric or magnetic. New definition of polarization matrix constructed from the field-strength tensor, Ricci Tensor, is introduced. Using Jaynes-Cummings model Hamiltonian for electrical dipole atom, some statistical properties of the rcidiation are considered. A new method for polarization measurement at short and intermediate distances from the source, based on the use of optical Aharonov-Bohm effect is proposed which is classified as a quantum nondemolition measurement. This proposed experiment leads to measure the longitudinal pohirization and spcicetirne correlation of polarizations of multipole radiation.