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Now showing items 21-30 of 38
Electromagnetically induced transparency controlled by a microwave field
(American Physical Society, 2009)
We have experimentally studied the propagation of two optical fields in a dense rubidium (Rb) gas in the case when an additional microwave field is coupled to the hyperfine levels of Rb atoms. The Rb energy levels form a ...
Effect of the counterrotating-wave terms on the spontaneous emission from a multilevel atom
(American Physical Society, 2009)
The spontaneous decay of a multilevel atom interacting with the electromagnetic field in free space is investigated with a unitary transformation method, which is introduced in order to include all rotating and counter-rotating ...
Hanbury Brown-Twiss effect and thermal light ghost imaging: A unified approach
(American Physical Society, 2009)
We compare the Hanbury Brown-Twiss (HBT) and the thermal light ghost imaging schemes in both near and far fields. Both effects arise as a result of the intensity fluctuations of the thermal light and we find that the ...
Entanglement of Gaussian states using a beam splitter RID A-4660-2010 RID B-8901-2008
(American Physical Society, 2009)
We study an experimental scheme to generate Gaussian two-mode entangled states via beam splitter. Specifically, we consider a nonclassical Gaussian state (squeezed state) and a thermal state as two input modes, and evaluate ...
Weakly interacting Bose gas in a random environment
(American Physical Society, 2009)
The localization-disorder paradigm is analyzed for a specific system of weakly repulsive Bose gas at zero temperature placed into a quenched random potential. We show that at low average density or weak enough interaction ...
Theory of weak localization in ferromagnetic (Ga,Mn)As
(American Physical Society, 2009)
We study quantum interference corrections to the conductivity in (Ga,Mn)As ferromagnetic semiconductors using a model with disordered valence-band holes coupled to localized Mn moments through a p-d kinetic-exchange ...
Microscopic mechanism of the noncrystalline anisotropic magnetoresistance in (Ga,Mn)As
(American Physical Society, 2009)
Starting with a microscopic model based on the Kohn-Luttinger Hamiltonian and kinetic p-d exchange combined with Boltzmann formula for conductivity we identify the scattering from magnetic Mn combined with the strong ...
Further test of internal-conversion theory with a measurement in (197)Pt
(American Physical Society, 2009)
We have measured the K-shell internal conversion coefficient, alpha(K), for the 346.5-keV M4 transition in (197)Pt to be 4.23(7). This result differs from a previous value, which disagreed significantly from theory. Our ...
Measurements of phi meson production in relativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC)
(American Physical Society, 2009)
We present results for the measurement of phi meson production via its charged kaon decay channel phi -> K(+) K(-) Au + Au collisions at root S(NN) = 62.4, 130, and 200 GeV, and in p + p and d + Au collisions at v root ...
Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV
(American Physical Society, 2009)
The results of midrapidity (0 < y < 0.8) neutral pion spectra over an extended transverse momentum range (1 < p(T) < 12 GeV/c) in root s(NN) = 200 GeV Au + Au collisions, measured by the STAR experiment, are presented. The ...