Quantum phases in artificial molecules

Details Quantum phases in artificial molecules Quantum phases in artificial molecules

2001-05-22

arxiv.org/abs/cond-mat/0105427v1

Solid State Communications 119, 309 (2001).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

29 pages, 8 figures (ps and eps), LaTeX 2e, ELSART package. To appear in Solid State Communications - Special Issue on Spin Ef

Scientific paper

10.1016/S0038-1098(01)00226-5

The many-body state of carriers confined in a quantum dot is controlled by the balance between their kinetic energy and their Coulomb correlation. In coupled quantum dots, both can be tuned by varying the inter-dot tunneling and interactions. Using a theoretical approach based on the diagonalization of the exact Hamiltonian, we show that transitions between different quantum phases can be induced through inter-dot coupling both for a system of few electrons (or holes) and for aggregates of electrons and holes. We discuss their manifestations in addition energy spectra (accessible through capacitance or transport experiments) and optical spectra.

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