3,750 research outputs found
Simplified Renormalizable Model for Tribimaximal Mixing and Cabibbo Angle
In a simplified renormalizable model where the neutrinos have PMNS
(Pontecorvo-Maki-Nakagawa-Sakata) mixings tan and with flavor symmetry there is a
corresponding prediction where the quarks have CKM (Cabibbo-Kobayashi-Maskawa)
mixings tan.Comment: Further typos correcte
Analysis of Quark Mixing Using Binary Tetrahedral Flavor Symmetry
Using the binary tetrahedral group , the three angles and phase of the
quark CKM mixing matrix are pursued by symmetry-breaking which involves
-doublet VEVs and the Chen-Mahanthappa CP-violation mechanism. The
NMRTM, Next-to-Minimal-Renormalizable -T-Model is described, and
its one parameter comparison to experimental data is explored.Comment: 14 pages latex. Two .eps figures include
Enhanced energy relaxation process of quantum memory coupled with a superconducting qubit
For quantum information processing, each physical system has different
advantage for the implementation and so hybrid systems to benefit from several
systems would be able to provide a promising approach. One of the common hybrid
approach is to combine a superconducting qubit as a controllable qubit and the
other quantum system with a long coherence time as a memory qubit. The
superconducting qubit allows us to have an excellent controllability of the
quantum states and the memory qubit is capable of storing the information for a
long time. By tuning the energy splitting between the superconducting qubit and
the memory qubit, it is believed that one can realize a selective coupling
between them. However, we have shown that this approach has a fundamental
drawback concerning energy leakage from the memory qubit. The detuned
superconducting qubit is usually affected by severe decoherence, and this
causes an incoherent energy relaxation from the memory qubit to the
superconducting qubit via the imperfect decoupling. We have also found that
this energy transport can be interpreted as an appearance of anti quantum Zeno
effect induced by the fluctuation in the superconducting qubit. We also discuss
a possible solution to avoid such energy relaxation process, which is feasible
with existing technology
Phase Transition in a One-Dimensional Extended Peierls-Hubbard Model with a Pulse of Oscillating Electric Field: II. Linear Behavior in Neutral-to-Ionic Transition
Dynamics of charge density and lattice displacements after the neutral phase
is photoexcited is studied by solving the time-dependent Schr\"odinger equation
for a one-dimensional extended Peierls-Hubbard model with alternating
potentials. In contrast to the ionic-to-neutral transition studied previously,
the neutral-to-ionic transition proceeds in an uncooperative manner as far as
the one-dimensional system is concerned. The final ionicity is a linear
function of the increment of the total energy. After the electric field is
turned off, the electronic state does not significantly change, roughly keeping
the ionicity, even if the transition is not completed, because the ionic
domains never proliferate. As a consequence, an electric field with frequency
just at the linear absorption peak causes the neutral-to-ionic transition the
most efficiently. These findings are consistent with the recent experiments on
the mixed-stack organic charge-transfer complex, TTF-CA. We artificially modify
or remove the electron-lattice coupling to discuss the origin of such
differences between the two transitions.Comment: 17 pages, 9 figure
LHC Higgs Production and Decay in the T' Model
At TeV, the standard model needs at least
integrated luminosity at LHC to make a definitive discovery of the Higgs boson.
Using binary tetrahedral () discrete flavor symmetry, we discuss how the
decay of the lightest Higgs into can be effectively
enhanced and dominate over its decay into . Since the two-photon
final state allows for a clean reconstruction, a decisive Higgs discovery may
be possible at 7 TeV with the integrated luminosity only of .Comment: 17 pages, 9 figure
High-K Precession modes: Axially symmetric limit of wobbling motion
The rotational band built on the high-K multi-quasiparticle state can be
interpreted as a multi-phonon band of the precession mode, which represents the
precessional rotation about the axis perpendicular to the direction of the
intrinsic angular momentum. By using the axially symmetric limit of the
random-phase-approximation (RPA) formalism developed for the nuclear wobbling
motion, we study the properties of the precession modes in W; the
excitation energies, B(E2) and B(M1) values. We show that the excitations of
such a specific type of rotation can be well described by the RPA formalism,
which gives a new insight to understand the wobbling motion in the triaxial
superdeformed nuclei from a microscopic view point.Comment: 14 pages, 8 figures (Spelling of the authors name was wrong at the
first upload, so it is corrected
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