کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5404222 | 1505932 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Laser-driven molecular wires studied by a non-Markovian density matrix approach
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Laser-driven molecular wires studied by a non-Markovian density matrix approach Laser-driven molecular wires studied by a non-Markovian density matrix approach](/preview/png/5404222.png)
چکیده انگلیسی
The electron transport through a molecular wire under the influence of an external laser field is studied using a density matrix formalism in which the full system is partitioned into a relevant part and fermionic reservoirs. An approach proposed earlier for bosonic environments which employs a numerical decomposition of the spectral density is used to describe the coupling between the fermionic reservoirs and the molecular wire in second-order perturbation theory. Furthermore, from the resulting time-nonlocal scheme a time-local approach can be derived and both are used to propagate the reduced density operator in time for an arbitrary time-dependent system Hamiltonian which incorporates the laser field non-perturbatively. For certain parameter regimes of the spectral decomposition, namely narrow bands, a shift between time-local and time-nonlocal results can be observed. We also demonstrate the influence of a short laser pulse on the population dynamics of a wire connected to two reservoirs with different Fermi energies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volumes 119â120, JulyâOctober 2006, Pages 462-467
Journal: Journal of Luminescence - Volumes 119â120, JulyâOctober 2006, Pages 462-467
نویسندگان
Sven Welack, Ulrich Kleinekathöfer, Michael Schreiber,