Fano Effect in T-Shaped Double Quantum Dot Structure with Decoherence Effect

摘要

By introducing a floating lead to mimic the decoherence mechanism,the Fano effect in the linear conductance spectrum of a T-shaped double quantum dot structure is studied.We find that even in the case that the self-energy arising from the decoherence mechanism is much smaller than the coupling strength between the connected quantum dot and the conducting lead,the Fano lineshape can be largely destroyed.In addition,the decoherenee renders the high-order electron transmission paths unimportant to contributing to the Fano lineshape.