نتایج جستجو برای: einstein
تعداد نتایج: 26538 فیلتر نتایج به سال:
Einstein Lightlike Hypersurfaces of a Lorentz Space Form with a Semi-symmetric Non-metric Connection
We study Einstein lightlike hypersurfaces M of a Lorentzian space form M̃(c) admitting a semi-symmetric non-metric connection subject to the conditions; (1) M is screen conformal and (2) the structure vector field ζ of M̃ belongs to the screen distribution S(TM). The main result is a characterization theorem for such a lightlike hypersurface.
We study axially symmetric monopoles of both the SU(2) Yang-Mills-HiggsDilaton (YMHD) as well as of the SU(2) Einstein-Yang-Mills-Higgs-Dilaton (EYMHD) system. We find that equally to gravity, the presence of the dilaton field can render an attractive phase. We also study the influence of a massive dilaton on the attractive phase in the YMHD system.
Coherent behavior of spinor Bose-Einstein condensates is studied in the presence of a significant uncondensed (normal) component. Normal-superfluid exchange scattering leads to near-perfect local alignment between the spin fields of the two components. We observe that, through this spin locking, spin-domain formation in the condensate is vastly accelerated as the spin populations in the condens...
4 Bohr-Sommerfeld curves and Poincaré series 27 4.1 Bohr-Sommerfeld curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.2 Relative Poincaré series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.3 Hypercycles and geodesics . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.4 Horocycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
A q-analogue of the multiple gamma functions is introduced , and is shown to satisfy the generalized Bohr-Morellup theorem. Furthermore we give some expressions of these function. 1 2 MICHITOMO NISHIZAWA
The dynamics of matter-wave solitons in Bose-Einstein condensates (BEC) is considerably affected by the presence of a thermal cloud and the dynamical depletion of the condensate. Our numerical results, based on the time-dependent Hartree-Fock-Bogoliubov theory, demonstrate the collapse of the attractively interacting BEC via collisional emission of atom pairs into the thermal cloud, which split...
We propose a new method of creating solitons in elongated Bose-Einstein Condensates (BECs) by sweeping three laser beams through the BEC. If one of the beams is in the first order (TEM10) Hermite-Gaussian mode, its amplitude has a transversal π phase slip which can be transferred to the atoms creating a soliton. Using this method it is possible to circumvent the restriction set by the diffracti...
in this article we review an algebraic de finition of the gyrogroup and a simpli fied version of the gyrovector space with two fundamental examples on the open ball of finite-dimensional euclidean space, which are the einstein and möbius gyrovector spaces. we introduce the structure of gyrovector space and the gyroline on the open convex cone of positive de finite matrices and see its interest...
Advanced gravitational wave interferometers, currently under realization, will soon permit the detection of gravitational waves from astronomical sources. To open the era of precision gravitational wave astronomy, a further substantial improvement in sensitivity is required. The future space-based Laser Interferometer Space Antenna and the third-generation ground-based observatory Einstein Tele...
MENTAL RETARDATION RESEARCH CENTERS (MRRCs)............................................................ 2 THE MRRC AT THE ROSE F. KENNEDY CENTER, ALBERT EINSTEIN COLLEGE OF MEDICINE, YESHIVA UNIVERSITY, BRONX, NY ......................................................................... 4 THE MRRC AT CHILDREN=S HOSPITAL, BOSTON, MA....................................................................
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