Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-09-24
Phys.Rev. B67 (2003) 125314
Physics
High Energy Physics
High Energy Physics - Theory
15 pages (no figures)
Scientific paper
10.1103/PhysRevB.67.125314
Noncommutative geometry governs the physics of quantum Hall (QH) effects. We introduce the Weyl ordering of the second quantized density operator to explore the dynamics of electrons in the lowest Landau level. We analyze QH systems made of $N$-component electrons at the integer filling factor $\nu=k\leq N$. The basic algebra is the SU(N)-extended W$_{\infty}$. A specific feature is that noncommutative geometry leads to a spontaneous development of SU(N) quantum coherence by generating the exchange Coulomb interaction. The effective Hamiltonian is the Grassmannian $G_{N,k}$ sigma model, and the dynamical field is the Grassmannian $G_{N,k}$ field, describing $k(N-k)$ complex Goldstone modes and one kind of topological solitons (Grassmannian solitons).
Ezawa Z. F.
Hasebe Kazuki
Tsitsishvili George
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