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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.