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- W3102199241 abstract "A one-dimensional, two-channel quantum wire is studied in the effective non-Hermitian Hamiltonian framework. Analytical expressions are derived for the band structure of the isolated wire. Quantum states and transport properties of the wire coupled to two ideal leads at the edges are studied in detail. The width distribution of the quasistationary states varies as a function of the coupling strength to the environment. At weak coupling, all the eigenenergies uniformly acquire small widths. The picture changes entirely at strong coupling, a certain number of states (“super-radiant”) are greatly broadened, while the rest remain long-lived states, a pure quantum mechanical effect as a consequence of quantum interference. The transition between the two regimes greatly influences the transport properties of the system. The maximum transmission through the wire occurs at the super-radiance transition. We consider also a realistic situation with energy-dependent coupling to the continuum due to the existence of decay threshold where super-radiance still plays a significant role in transport properties of the system." @default.
- W3102199241 created "2020-11-23" @default.
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- W3102199241 date "2014-01-01" @default.
- W3102199241 modified "2023-09-23" @default.
- W3102199241 title "Superradiance in a two-channel quantum wire" @default.
- W3102199241 doi "https://doi.org/10.1063/1.4899232" @default.
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