Výsledky vyhledávání - "Belkhir, Lotfi"

At strong magnetic fields double-layer two-dimensional-electron-gas systems can form an unusual broken symmetry state with spontaneous inter-layer phase coherence. The system can be mapped to an equivalent system of pseudospin $1/2$ particles with ps

Externí odkaz: http://arxiv.org/abs/cond-mat/9605153

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Fractional quantum Hall effect in higher Landau levels

Autor: Belkhir, Lotfi, Jain, J. K.

We investigate, using finite size numerical calculations, the spin-polarized fractional quantum Hall effect (FQHE) in the first excited Landau level (LL). We find evidence for the existence of an incompressible state at $\nu = \frac{7}{3} = 2+\frac{1

Externí odkaz: http://arxiv.org/abs/cond-mat/9409020

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Quantum and Many-Body Effects on the Capacitance of a Quantum Dot

Autor: Belkhir, Lotfi

We calculate exactly, using finite size techniques, the quantum mechanical and many-body effects to the self-capacitance of a spherical quantum dot in the regime of extreme confinement, where the radius of the sphere is much smaller than the effectiv

Externí odkaz: http://arxiv.org/abs/cond-mat/9401067

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From Cooper Pairs to Composite Bosons: A Generalized RPA Analysis of Collective Excitations

Autor: Belkhir, Lotfi, Randeria, Mohit

The evolution of the ground state and the excitation spectrum of the two and three dimensional attractive Hubbard model is studied as the system evolves from a Cooper pair regime for weak attraction to a composite boson regime for a strong attraction

Externí odkaz: http://arxiv.org/abs/cond-mat/9310021

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