Direct measurement of the quantum state of the electromagnetic field in a superconducting transmission line

We propose an experimental procedure to directly measure the state of an electromagnetic field inside a resonator, corresponding to a superconducting transmission line, coupled to a Cooper-pair box (CPB). The measurement protocol is based on the use of a dispersive interaction between the field and the CPB, and the coupling to an external classical field that is tuned to resonance with either the field or the CPB. We present a numerical simulation that demonstrates the feasibility of this protocol, which is within reach of present technology.Comment: Accepted for publication in Physical Review A (Rapid Communication). 4 pages, 2 figure

Galactic Nonlinear Dynamic Model

We develop a model for spiral galaxies based on a nonlinear realization of the Newtonian dynamics starting from the momentum and mass conservations in the phase space. The radial solution exhibits a rotation curve in qualitative accordance with the observational data.Comment: 6 pages, 1 figure. Talk given in the 7th Alexander Friedmann International Seminar, June 29 to July 5, 2008, Joao Pessoa, PB, Brazi

Relativistic dynamics of Qqq systems

The bound state of constituent quarks forming a $Qqq$ composite baryon is investigated in a QCD-inspired effective light-front model. The light-front Faddeev equations are derived and solved numerically. The masses of the spin 1/2 low-lying states of the nucleon, $\Lambda^0$, $\Lambda^+_c$ and $\Lambda^0_b$ are found and compared to the experimental data. The data is qualitatively described with a flavor independent effective interaction.Comment: 18 pages, include 6 figures, 2 eps figures, use latex, revtex. To appear Phys. Rev D (2002

Ground State Masses and Biding Energies of the Nucleon, Hyperon and Heavy Baryons in a Light-Front Model

The ground state masses and binding energies of the nucleon, $\Lambda^0$, $\Lambda^+_c$, $\Lambda^0_b$ are studied within a constituent quark QCD-inspired light-front model. The light-front Faddeev equations for the $Qqq$ composite spin 1/2 baryons, are derived and solved numerically. The experimental data for the masses are qualitatively described by a flavor independent effective interaction.Comment: 13 pages, include 4 eps figures, use latex, revte

Somatic embryogenesis and ploidy stability in cassava (Manihot esculenta Crantz) cultivars regenerated by in vitro culture of young leaves.

The regeneration and cytogenetic analysis of 7 cassava (Manihot esculenta Crantz) cultivars obtained by organogenesis and somatic embryogenesis were investigated. In the first phase, callus formation was induced in young leaves using MS medium supplemented with 1.0, 5.0, 10.0, 15.0 and 20.0 mg/l of 2,4-D or without a growth regulator (control). In the second phase (development), the calli obtained in the above treatments were transferred to MS medium supplemented with factorial combinations of GA3 and BAP at 0, 0.5, 1.0, 1.5 and 2.0 mg/l. Results of the first phase showed that 2,4-D induced the formation of both friable and compact calli. The compact calli displayed root and shoot formation, whilst somatic embryos were obtained only from friable calli in the medium with 1.0 mg/l GA3. Plants obtained from somatic embryos were regenerated in MS medium supplemented with 0.04 mg/l NAA and 0.05 mg/l GA3. Cytogenetic analysis in 167 regenerated plants from somatic embryogenesis and 176 from organogenesis showed 2n= 36 as a normal diploid chromosome number