Charge and spin dynamics in interacting quantum dots

Janine Splettstoesser; Michele Governale; Juergen Koenig; Markus Buettiker

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Charge and spin dynamics in interacting quantum dots

机译：相互作用量子点中的电荷和自旋动力学

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The transient response of a quantum dot with strong Coulomb interaction to a fast change in the gate potential, as well as the stationary ac response to a slow harmonic variation in the gate potential are computed by means of a real-time diagrammatic expansion in the tunnel-coupling strength. We find that after a fast switching, the exponential relaxation behavior of charge and spin are governed by a single time constant each, which differ from each other due to Coulomb repulsion. We compare the response to a step potential with the RC time extracted from the ac response.

机译：具有高库仑相互作用的量子点对栅极电势的快速变化的瞬态响应，以及对栅极电势的慢谐波变化的静态交流响应，通过隧道中的实时图表扩展来计算耦合强度。我们发现，在快速切换之后，电荷和自旋的指数松弛行为分别受单个时间常数支配，由于库仑斥力，它们彼此不同。我们将阶跃电势的响应与从交流响应中提取的RC时间进行比较。

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来源
《Physical review》 |2010年第16期|165318.1-165318.5|共5页
作者
Janine Splettstoesser; Michele Governale; Juergen Koenig; Markus Buettiker;
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作者单位

Institut fuer Theoretische Physik A, RWTH Aachen University, D-52056 Aachen, Germany JARA-Fundamentals of Future Information Technology, Germany;

School of Physical and Chemical Sciences and MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand;

rnTheoretische Physik, Universitaet Duisburg-Essen and CeNIDE, D-47048 Duisburg, Germany;

rnDepartement de Physique Theorique, Universite de Geneve, CH-1211 Geneve 4, Switzerland;

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正文语种 eng
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electronic transport in mesoscopic systems;

机译：介观系统中的电子传输;

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7. Charge and spin dynamics in interacting quantum dots [O] . Splettstoesser, Janine, Governale, Michele, König, Jürgen, 2010

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Charge and spin dynamics in interacting quantum dots

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