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Coherent versus Sequential Electron Tunneling in Quantum Dots

2003; American Physical Society; Volume: 91; Issue: 11 Linguagem: Inglês

10.1103/physrevlett.91.116801

1092-0145

Luis E. F. Foa Torres, Caio Lewenkopf, Horacio M. Pastawski,

Quantum Information and Cryptography

Manifestations of quantum coherence in the electronic conductance through nearly closed quantum dots in the Coulomb-blockade regime are addressed. We show that quantum coherent tunneling processes explain some puzzling statistical features of the conductance peak heights observed in recent experiments at low temperatures. We employ the constant interaction model and the random matrix theory to model the quantum dot electronic interactions and its single-particle statistical fluctuations, taking full account of the finite decay width of the quantum dot levels.