Connection between rotation and miscibility in a two-component Bose-Einstein condensate

A two-component Bose-Einstein condensate rotating in a toroidal trap is investigated. The topological constraint depends on the density distribution of each component along the circumference of the torus, and therefore the quantization condition on the circulation can be controlled by changing the miscibility using the Feshbach resonance. We find that the system exhibits a variety of dynamics depending on the initial angular momentum when the miscibility is changed.Comment: 6 pages, 7 figure

Lipoatrophic diabetes. Report of a case

The female patient initially showed the acquired type of total lipoatrophy at about 8 years of age. At 12 years of age, the onset of diabetes mellitus was speculated from advanced pyodermia and dedentition. At 29 years of age, glucosuria was found, and she developed proteinuria, ascites, and pretibial edema. The physical examination revealed: hepatosplenomegaly, complete absence of subcutanous fat, cutaneous xanthomas, and emaciated facies with pronounced zygomatic arches. Diabetic retinopathy was revealed in the ophthalmological examination, and nephropathy was evident in renal biopsy specimens. She also had peripheral diabetic neuropathy. No adipose tissue was found in the mesenterium under peritoneoscopy. The hepatic biopsy specimen revealed advanced portal liver cirrhosis. Laboratory findings included: hyperlipidemia, elevation of BMR without evidence of hyperthyroidism, impaired renal function, and undetected anti-insulin antibodies and anti-insulin antibodies. Endocrinological examinations revealed normal value, except for an impaired hGH response in the arginine test. C-peptide immunoreactivity was high. Her condition was fairly well controlled by 140 units of insulin injection daily.</p

Controlled generation and manipulation of vortex dipoles in a Bose-Einstein condensate

We propose methods to generate and manipulate vortex dipoles in a Bose-Einstein condensate using Gaussian beams of red or blue-detuned laser. Velocity-controlled vortex dipoles are shown to be created and launched by a red-detuned beam and by two blue-detuned beams. Critical velocities for the vortex nucleation are investigated. The launched vortex dipoles can be trapped, curved, accelerated, and decelerated using Gaussian beams. Collisions between vortex dipoles are demonstrated.Comment: 9 pages, 10 figure

Spatio-temporal chaos of one-dimensional thin elastic layer with the rate-and-state friction law

The rate-and-state friction (RSF) law is an empirical law often used to model the behavior of rock friction and reproduce the behavior of earthquakes. Recently, the model has been expanded to include so-called slow earthquakes, which are observed at the margins between steadily sliding aseismic and seismogenic zones. In this study, we incorporate the RSF law into a one-dimensional elastic layer spanned perpendicular to the loading direction as a model for the marginal area between aseismic and seismogenic zones. We obtained the complex Ginzburg-Landau equation near a Hopf bifurcation, and showed that the system has Benjamin-Fair instability, leading to spatio-temporal chaos. We conducted numerical calculations near the Hopf bifurcation point, and showed that an irregular oscillation appears when parameters with Benjamin-Feir instability are employed. The size of slip event showed an exponential distribution that resembles a type of slow earthquake.Comment: 33 pages, 7 figure

X-ray magnetic circular dichroism and photoemission study of the diluted ferromagnetic semiconductor Zn1−x_{1-x}Crx_xTe

We have performed x-ray magnetic circular dichroism (XMCD) and valence-band photoemission studies of the diluted ferromagnetic semiconductor Zn$_{1-x}$Cr$_x$Te. XMCD signals due to ferromagnetism were observed at the Cr 2p absorption edge. Comparison with atomic multiplet calculations suggests that the magnetically active component of the Cr ion was divalent under the tetrahedral crystal field with tetragonal distortion along the crystalline a-, b-, and c-axes. In the valence-band spectra, spectral weight near the Fermi level was strongly suppressed, suggesting the importance of Jahn-Teller effect and the strong Coulomb interaction between the Cr 3d electrons

Vector Mesons in Nuclear Medium

We summarize the current theoretical and experimental status of the spectral change of the vector mesons in dense matter.Comment: 4 pages, Latex, talk at Quark Matter '9