| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
We study the interplay of quantum interference and interactions in open quantum systems by constructing exact many-electron scattering states. First, we investigate the interacting resonant-level models which consist of two leads connected to a quantum dot with asymmetric interactions. We calculate average electric current and average dot-occupancy for the systems under bias voltages in the first order of the interaction. As a result, we observe the suppression of the electric current for large bias voltages and the restoration of the suppressed electric current due to the asymmetry of the systems. Next, we apply this method to open double quantum-dot systems with an interdot interaction. Exact many-electron scattering states tell us that the binding strength of many-body bound states depends on the arrangement of the two quantum dots. We also calculate the average electric current for the systems under bias voltages. We verify that the result is reproduced by the Keldysh formalism.
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