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首页> 外文期刊>Physical Review, B. Condensed Matter >Resonant tunneling through a quantum dot weakly coupled to quantum wires or quantum Hall edge states
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Resonant tunneling through a quantum dot weakly coupled to quantum wires or quantum Hall edge states

机译:穿过弱耦合到量子线或量子霍尔边缘状态的量子点的共振隧穿

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Resonant tunneling through a quantum dot weakly coupled to Tomonaga-Luttinger liquids is discussed. The linear conductance due to sequential tunneling is calculated by solving a master equation for temperatures below and above the average level spacing in the dot. When the parameter g characterizing the Tomonaga-Luttinger liquid is smaller than 1/2, the resonant tunneling process is incoherent down to zero temperature. At low temperature T the height and width of the conductance peaks in the Coulomb blockade oscillations are proportional to T1/g-2 and T, respectively. The contribution from tunneling via a virtual intermediate state (cotunneling) is also included. The resulting conductance formula can be applied for the resonant tunneling between edge states of fractional quantum Hall liquids with filling factor nu=1/(2m+1)=g. [References: 31]
机译:讨论了通过弱耦合到Tomonaga-Luttinger液体的量子点的共振隧穿。通过求解温度低于和高于点中平均水平间距的主方程,可以计算出因顺序隧穿而产生的线性电导。当表征Tomonaga-Luttinger液体的参数g小于1/2时,共振隧穿过程在低至零温度时是非相干的。在低温T下,库仑阻塞振荡中电导峰的高度和宽度分别与T1 / g-2和T成正比。还包括通过虚拟中间状态进行隧道传输(共同隧道)的贡献。所得的电导公式可用于填充因子nu = 1 /(2m + 1)= g的分数量子霍尔液体的边缘状态之间的共振隧穿。 [参考:31]

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