Decoherence and quantum interference assisted electron trapping in a quantum dot | Zendy

Halawany Ahmed El | Zendy; Leuenberger Michael N. | Zendy

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Decoherence and quantum interference assisted electron trapping in a quantum dot

Author(s) -

Halawany Ahmed El,

Leuenberger Michael N.

Publication year - 2014

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.201350266

Subject(s) - quantum decoherence , electron , physics , quantum dot , hamiltonian (control theory) , quantum mechanics , trapping , nanoring , quantum , quantum dissipation , atomic physics , condensed matter physics , optoelectronics , mathematical optimization , ecology , mathematics , biology

We present a theoretical model for the dynamics of an electron that gets trapped by means of decoherence and quantum interference in the central quantum dot (QD) of a semiconductor nanoring (NR) made of five QDs, between 100 and 300 K. The electron's dynamics is described by a master equation with a Hamiltonian based on the tight‐binding model, taking into account electron–LO phonon interaction. Based on this configuration, the probability to trap an electron with no decoherence is almost 27%. In contrast, the probability to trap an electron with decoherence is 70% at 100 K, 63% at 200 K and 58% at 300 K. Our model provides a novel method of trapping an electron at room temperature.

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