نتایج جستجو برای: dipole
تعداد نتایج: 23536 فیلتر نتایج به سال:
We systematically study the properties of a charged Coulomb Bose gas with dipole-dipole interactions in weak coupling limit at both zero and finite temperatures using Hartree-Fock-Bogoliubov approach. numerically analyze collective excitations, condensate fraction, depletion, chemical potential, static structure factor. Moreover, we compare our new findings those nondipolar gas. Our results rev...
The surface spin wave branches in ferromagnetic films are studied using a microscopic theory which considers both magnetic dipole-dipole and Heisenberg exchange interactions. The dipole terms are expressed in a Hamiltonian formalism, and the dipole sums are calculated in a rapidly convergent form. The Damon-Eshbach surface modes are analyzed for different directions of the spin-wave propagation...
Much of the work of Spectrum Planning Group is based on well established principles of ‘antennas and propagation’. Propagation matters have received a lot of attention over the years and much has been written on the topic but the ‘antennas’ part, although arguably simpler, may lack a suitable written reference that gathers much of the relevant material into one place. The primary purpose of thi...
We show that a Bose-Einstein condensate of heteronuclear molecules in the regime of small and static electric fields is described by a quantum rotor model for the macroscopic electric dipole moment of the molecular gas cloud. We solve this model exactly and find the symmetric, i.e., rotationally invariant, and dipolar phases expected from the single-molecule problem, but also an axial and plana...
A concept of CP-violating T,P-odd permanent molecular magnetic moments CP is introduced. We relate the moments to the electric dipole moment of electron eEDM and estimate CP for several diamagnetic polar molecules. The moments exhibit a steep, Z5, scaling with the nuclear charge Z of the heavier molecular constituent. A measurement of the CP-violating magnetization of a polarized sample of heav...
The electric dipole moment of a magnetic monopole with spin is studied in the N = 2 supersymmetric gauge theory. Dipole moments of electric charge distributions, as well as dipole moments due to magnetic currents, are calculated. The contribution of the charge distribution of the fermion to the gyroelectric ratio is expressed in terms of ζ(3).
Many mixed-valence systems involve two or more states with different electric dipole moments whose magnitudes depend upon the charge transfer distance and the degree of delocalization; these systems can be interconverted by excitation of an intervalence charge transfer transition. Stark spectroscopy involves the interaction between the change in dipole moment of a transition and an electric fie...
In contrast to van der Waals (vdW) forces, Coulombic dipolar forces may play a significant role in the coagulation of nanoparticles (NPs) but has received little or no attention. In this work, the effect of dipole-dipole interaction on the enhancement of the coagulation of two spherically shaped charge-neutral TiO(2) NPs, in the free molecular regime, is studied using classical molecular dynami...
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