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Akademický článek
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Magnetic properties of two and three-dimensional clusters of quantum dots are studied with exact diagonalization of a generalized Hubbard model. We study the weak coupling limit, where the electrons interact only within a quantum dot and consider cas
Externí odkaz:
http://arxiv.org/abs/0804.4745
We study the spectral and magnetic properties of one-dimensional lattices filled with 2 to 4 fermions (with spin 1/2) per lattice site. We use a generalized Hubbard model that takes account all interactions on a lattice site, and solve the many-parti
Externí odkaz:
http://arxiv.org/abs/0803.2857
We propose a universal transformation from a many-boson state to a corresponding many-fermion state in the lowest Landau level approximation of rotating many-body systems, inspired by the Laughlin wave function and by the Jain composite-fermion const
Externí odkaz:
http://arxiv.org/abs/0801.0966
Spectral properties of rotating electrons in quantum dots and their relation to quantum Hall liquids
Publikováno v:
J. Phys.: Condens. Matter 19 (2007) 076211 (25pp)
The exact diagonalization technique is used to study many-particle properties of interacting electrons with spin, confined in a two-dimensional harmonic potential. The single-particle basis is limited to the lowest Landau level. The results are analy
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605321
Publikováno v:
Phys. Rev. A 74, 043603 (2006)
Finite quantal systems at high angular momenta may exhibit vortex formation and localization. These phenomena occur independent of the statistics of the repulsively interacting particles, which may be of bosonic or fermionic nature. We analyze the re
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605052
Publikováno v:
New Journal of Physics 8, 59 (2006)
Small crystallites form when finite quantal systems are set highly rotating. This crystallization is independent of the statistics of the particles, and occurs for both trapped bosons and fermions. The spin degree of freedom does not change the tende
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602039
We employ the density functional Kohn-Sham method in the local spin-density approximation to study the electronic structure and magnetism of quasi one-dimensional periodic arrays of few-electron quantum dots. At small values of the lattice constant,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505036
Vortices can form when finite quantal systems are set to rotate. In the limit of small particle numbers the vortex formation in a harmonically trapped fermion system, with repulsively interacting particles, shows similarities to the corresponding bos
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412660
Publikováno v:
Phys. Rev. Lett. 94, 106405 (2005)
In a quantum-mechanical system, particle-hole duality implies that instead of studying particles, we can get equivalent information by studying the missing particles, the so-called holes. Using this duality picture for rotating fermion condensates th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410622