Spontaneous Coherence and Collective Modes in Double-Layer Quantum Dot Systems

Details Spontaneous Coherence and Collective Modes in Double-Layer Quantum Dot Systems Spontaneous Coherence and Collective Modes in Double-Layer Quantum Dot Systems

1996-04-19

arxiv.org/abs/cond-mat/9604127v2

Physics

Condensed Matter

20 pages (figures included) and also available at http://fangio.magnet.fsu.edu/~jhu/Paper/qdot_cond.ps, replaced to fix figure

Scientific paper

10.1103/PhysRevB.54.8616

We study the ground state and the collective excitations of parabolically-confined double-layer quantum dot systems in a strong magnetic field. We identify parameter regimes where electrons form maximum density droplet states, quantum-dot analogs of the incompressible states of the bulk integer quantum Hall effect. In these regimes the Hartree-Fock approximation and the time-dependent Hartree-Fock approximations can be used to describe the ground state and collective excitations respectively. We comment on the relationship between edge excitations of dots and edge magneto-plasmon excitations of bulk double-layer systems.

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