Showing 91 - 100 of 200
In order to describe unbalanced ultracold fermionic quantum gases on optical lattices in a harmonic trap, we investigate an attractive (U 0) asymmetric (t<Subscript>↑</Subscript>≠t<Subscript>↓</Subscript>) Hubbard model with a Zeeman-like magnetic field. In view of the model's spatial inhomogeneity, we focus in this paper on the...</subscript></subscript>
Persistent link: https://www.econbiz.de/10009280071
A quintic complex Ginzburg-Landau equation is derived from a Landau-Lifshitz-Gilbert equation and is used to describe the magnetization dynamics in a one-dimensional uni-axial ferromagnet. Trough the use of suitable approximations, we derive the magnetic solitary wave excitations solutions which...
Persistent link: https://www.econbiz.de/10009280082
Persistent link: https://www.econbiz.de/10009280099
Persistent link: https://www.econbiz.de/10009280108
Lie groups involving potential symmetries are applied in connection with the system of magnetohydrodynamic equations for incompressible matter with Ohm's law for finite resistivity and Hall current in cylindrical geometry. Some simplifications allow to obtain a Fokker-Planck type equation....
Persistent link: https://www.econbiz.de/10009280134
Using low-pressure chemical vapour deposition (LPCVD), multi-walled carbon nanotubes (MWNTs) are grown on nanocrystalline Fe<Subscript>70</Subscript>Pt<Subscript>30</Subscript> film. The Fe<Subscript>70</Subscript>Pt<Subscript>30</Subscript> nanocrystalline film is deposited by vapour condensation technique. The size of the nanoparticles varies from 5–10 nm, as inferred from SEM...</subscript></subscript></subscript></subscript>
Persistent link: https://www.econbiz.de/10009280200
The non-equilibrium dynamics of the kinetic spherical model with a non-conserved order-parameter, quenched to T≤T<Subscript>c</Subscript> from a fully disordered initial state, is studied at its upper critical dimension d=d<Superscript>*</Superscript>=4. In the scaling limit where both the waiting time s and the observation time t are large...</superscript></subscript>
Persistent link: https://www.econbiz.de/10009280208
The critical behavior of the Ising chain with long-range ferromagnetic interactions decaying with distance r<Superscript>α</Superscript>, 1α2, is investigated using a numerically efficient transfer matrix (TM) method. Finite size approximations to the infinite chain are considered, in which both the number of spins and...</superscript>
Persistent link: https://www.econbiz.de/10009280231
The long-range forces between holes in an antiferromagnet are due to magnon exchange. The one-magnon exchange potential between two holes is proportional to cos(2 ϕ)/<Emphasis Type="Bold">r <Superscript>2</Superscript> where <Emphasis Type="Bold">r is the distance vector of the holes and ϕ is the angle between <Emphasis Type="Bold">r and an axis of the square crystal lattice....</emphasis></emphasis></superscript></emphasis>
Persistent link: https://www.econbiz.de/10009280244
The Battle of the Sexes describes asymmetric conflicts in mating behavior of males and females. Males can be philanderer or faithful, while females are either fast or coy, leading to a cyclic dynamics. The adjusted replicator equation predicts stable coexistence of all four strategies. In this...
Persistent link: https://www.econbiz.de/10009280299