نتایج جستجو برای: shafer landau
تعداد نتایج: 15295 فیلتر نتایج به سال:
We consider a quantum Hall system of electrons confined to the uppermost Landau level and assume that the lower Landau levels are full and inert causing no Landau level mixing. While it is known that the problem of electrons interacting with the Coulomb interaction in a higher Landau level is mathematically equivalent to the problem of electrons in the lowest Landau level interacting with an ef...
دراین مقاله با اعمال آزمون های گوناگون مبتنی بر نظریه کنترل و نیز آزمون های landauبر پایه نظریه معیار کنترل به بررسی ساخت های کنترلی می پردازیم. داده های زبان فارسی حاکی از آن است که آزمون های کنترل Landau با زبان فارسی سازگار است ولی آزمون های HornStein چنین سازگاری را نشان نمی دهد. به دیگر سخن، نظریه اخیر در زبان فارسی تایید نمیشود.
The London free-energy is regeneralized by the Ginsburg-Landau free-energy density in the presence of both d and s order parameters. We have shown that the strength of the s-d coupling, makes an important rule to determine the form of the lattice vortex. Appearance of the ratios of the coherence length to penetration depth in the higher order corrections of the free-energy density will trunca...
Considering a temperature dependent two-level quantum system, we have numerically solved the Landau-Zener transition problem. The method includes the incorporation of temperature effect as a thermal noise added Schrödinger equation for the construction of the Hamiltonian. Here, the obtained results which describe the changes in the system including the quantum states and the transition pro...
The fractional quantum Hall effect is a canonical example of electron-electron interactions producing new ground states in many-body systems. Most fractional quantum Hall studies have focussed on the lowest Landau level, whose fractional states are successfully explained by the composite fermion model. In the widely studied GaAs-based system, the composite fermion picture is thought to become u...
The microwave-photoexcited high mobility GaAs/AlGaAs two-dimensional electron system exhibits an oscillatory-magnetoresistance with vanishing resistance in the vicinity of magnetic fields B = [4/(4j + 1)]Bf , where Bf = 2πfm ∗/e, m∗ is an the effective mass, e is the charge, f is the microwave frequency, and j =1,2,3... Here, we report transport with well-resolved Landau levels, and some transm...
دراین مقاله با اعمال آزمون های گوناگون مبتنی بر نظریه کنترل و نیز آزمون های landauبر پایه نظریه معیار کنترل به بررسی ساخت های کنترلی می پردازیم. داده های زبان فارسی حاکی از آن است که آزمون های کنترل landau با زبان فارسی سازگار است ولی آزمون های hornstein چنین سازگاری را نشان نمی دهد. به دیگر سخن، نظریه اخیر در زبان فارسی تایید نمیشود.
A bstract Scattering amplitudes in quantum field theories have intricate analytic properties as functions of the energies and momenta scattered particles. In perturbation theory, their singularities are governed by a set nonlinear polynomial equations, known Landau equations , for each individual Feynman diagram. The singularity locus associated integral is made precise with notion discriminant...
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