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Now showing items 21-30 of 32
Quantum correlations between a pair of Raman photons from a single atom under arbitrary excitation condition
(American Physical Society, 2005-10-19)
The quantum correlation between a pair of Stokes and anti-Stokes photons, involving a Raman emission process is calculated. All realistic radiative and nonradiative decays are included in the calculation and the photon ...
Adiabatic compression of parallel-plate metal waveguides for sensitivity enhancement of waveguide THz time-domain spectroscopy
(AIP Publishing, 2005-02-02)
We demonstrate the efficient coupling of THz pulses into and out of an adiabatically compressed parallel-plate metal waveguide. The plate separation of the 63.5-mm long, compressed waveguide was fixed at 103 um at the ...
Implementing Deutsch-Jozsa algorithm using light shifts and atomic ensembles
(American Physical Society, 2005-01-27)
We present an optical scheme to implement the Deutsch-Jozsa algorithm using ac Stark shifts. The scheme uses an atomic ensemble consisting of four-level atoms interacting dispersively with a field. This leads to a Hamiltonian ...
Synthesis of ZnO nanocrystals by subsequent implantation of Zn and O species
(AIP Publishing, 2005-04-29)
We report the preparation of ZnO nanocrystals embedded in a SiO2 matrix formed using sequential zinc and oxygen ion implantations. The optical absorption spectra and photoemission spectra of zinc implanted and zinc/oxygen ...
Sequence analysis of the msp4 gene of Anaplasma phagocytophilum strains
(American Society for Microbiology, 2005-03)
The causative agent of human granulocytic ehrlichiosis was recently reclassified as Anaplasma phagocytophilum, unifying previously described bacteria that cause disease in humans, horses, dogs, and ruminants. For the ...
Hybrid positron detection and optical coherence tomography system: Design, calibration, and experimental validation with rabbit atherosclerotic models
(SPIE, the international society for optics and photonics, 2005-07-01)
We evaluate the performance of our novel hybrid optical coherence tomography (OCT) and scintillating probe, demonstrate simultaneous OCT imaging and scintillating detection, and validate the system using an atherosclerotic ...
End reductions, fundamental groups, and covering spaces of irreducible open 3-manifolds
(Mathematical Sciences Publishers, 2005-05-29)
Suppose M is a connected, open, orientable, irreducible 3-manifold which is not homeomorphic to ℝ³. Given a compact 3-manifold J in M which satisfies certain conditions, Brin and Thickstun have associated to it an open ...
Vacuum-induced Stark shifts for quantum logic using a collective system in a high-quality dispersive cavity
(American Physical Society, 2005-05-13)
A collective system of atoms in a high-quality cavity can be described by a nonlinear interaction which arises due to the Lamb shift of the energy levels due to the cavity vacuum [Agarwal et al., Phys. Rev. A 56, 2249 ...
Comparison of gene expression signatures of diamide, H2O2 and menadione exposed Aspergillus nidulans cultures - Linking genome-wide transcriptional changes to cellular physiology
(BioMed Central, 2005-12-20)
Background: In addition to their cytotoxic nature, reactive oxygen species (ROS) are also signal molecules in diverse cellular processes in eukaryotic organisms. Linking genome-wide transcriptional changes to cellular ...
Quantum random walk of the field in an externally driven cavity
(American Physical Society, 2005-09-16)
Using a resonant interaction between atoms and the field in a high-quality cavity, we show how to realize quantum random walks as proposed by Aharonov et al. [Phys. Rev. A 48, 1687 (1993)]. The atoms are driven strongly ...