12,846 research outputs found
On the Effect of theta_{13} on the Determination of Solar Oscillation Parameters at KamLAND
If the solution to the solar neutrino puzzle falls in the LMA region, KamLAND
should be able to measure with good precision the corresponding oscillation
parameters after a few years of data taking. Assuming a positive signal, we
study their expected sensitivity to the solar parameters (theta_{12},Delta
m^2_{21}) when considered in the framework of three-neutrino mixing after
taking into account our ignorance on the mixing angle theta_{13}. We find a
simple ``scaling'' dependence of the reconstructed theta_{12} range with the
value of theta_{13} while the Delta m^2_{12} range is practically unaffected.
Our results show that the net effect is approximately equivalent to an
uncertainty on the overall neutrino flux normalization of up to sim 10 %.Comment: 6 pages, 2 figures. Typos corrected and reference added. Final
version to appear in PL
Quantum-state synthesis of multi-mode bosonic fields: Preparation of arbitrary states of 2-D vibrational motion of trapped ions
We present a universal algorithm for an efficient deterministic preparation
of an arbitrary two--mode bosonic state. In particular, we discuss in detail
preparation of entangled states of a two-dimensional vibrational motion of a
trapped ion via a sequence of laser stimulated Raman transitions. Our formalism
can be generalized for multi-mode bosonic fields. We examine stability of our
algorithm with respect to a technical noise.Comment: 8 pages, revtex, including 2 ps-figures, section about physical
implementation added, references updated, submitted to Phys. Rev. A, computer
program available at http://www.savba.sk/sav/inst/fyzi/qo
Faddeev approach to the octet and decuplet baryons
A relativistic Faddeev model for the baryon octet is extended to treat the
baryon decuplet. We find that after determining the model parameters in the
mesonic sector the masses of both nucleon and delta deviate by less than 5\%
from the experimental data and show only a very weak dependence on the
constituent quark mass.Comment: 9 page
Quantum mechanical counterpart of nonlinear optics
Raman-type laser excitation of a trapped atom allows one to realize the
quantum mechanical counterpart of phenomena of nonlinear optics, such as
Kerr-type nonlinearities, parametric amplification, and multi-mode mixing.
Additionally, huge nonlinearities emerge from the interference of the atomic
wave function with the laser waves. They lead to a partitioning of the phase
space accompanied by a significantly different action of the time evolution in
neighboring phase-space zones. For example, a nonlinearly modified coherent
"displacement" of the motional quantum state may induce strong amplitude
squeezing and quantum interferences.Comment: 6 pages, 4 figures, to be published in Phys. Rev. A 55 (June
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