39,496 research outputs found
Analysis of a spherical shell with a non-axisymmetric boundary
Spherical shell problem formulated in terms of stress functions, and applied to nonaxisymmetric boundar
Supersymmetric reduced models with a symmetry based on Filippov algebra
Generalizations of the reduced model of super Yang-Mills theory obtained by
replacing the Lie algebra structure to Filippov -algebra structures are
studied. Conditions for the reduced model actions to be supersymmetric are
examined. These models are related with what we call \{cal N}_{min}=2 super
-brane actions.Comment: v3: In the previous versions we overlooked that Eq.(3.9) holds more
generally, and missed some supersymmetric actions. Those are now included and
modifications including a slight change in the title were made accordingly.
1+18 page
Josephson-vortex-flow terahertz emission in layered high- superconducting single crystals
We report on the successful terahertz emission (0.61 THz) that is
continuous and tunable in its frequency and power, by driving Josephson
vortices in resonance with the collective standing Josephson plasma modes
excited in stacked BiSrCaCuO intrinsic Josephson junctions.
Shapiro-step detection was employed to confirm the terahertz-wave emission. Our
results provide a strong feasibility of developing long-sought solid-state
terahertz-wave emission devices
Double Phase Transitions in Magnetized Spinor Bose-Einstein Condensation
It is investigated theoretically that magnetized Bose-Einstein condensation
(BEC) with the internal (spin) degrees of freedom exhibits a rich variety of
phase transitions, depending on the sign of the interaction in the spin
channel. In the antiferromagnetic interaction case there exist always double
BEC transitions from single component BEC to multiple component BEC. In the
ferromagnetic case BEC becomes always unstable at a lower temperature, leading
to a phase separation. The detailed phase diagram for the temperature vs the
polarization, the spatial spin structure, the distribution of non-condensates
and the excitation spectrum are examined for the harmonically trapped systems.Comment: 6 pages, 7 figures. Submitted to J. Phys. Soc. Jp
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