Full counting statistics of transport electrons through a two-level quantum dot with spin–orbit coupling |
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Authors: | ZM Wang HB Xue NT Xue J-Q Liang |
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Affiliation: | 1. Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006, China;2. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China |
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Abstract: | We study the full counting statistics of transport electrons through a semiconductor two-level quantum dot with Rashba spin–orbit (SO) coupling, which acts as a nonabelian gauge field and thus induces the electron transition between two levels along with the spin flip. By means of the quantum master equation approach, shot noise and skewness are obtained at finite temperature with two-body Coulomb interaction. We particularly demonstrate the crucial effect of SO coupling on the super-Poissonian fluctuation of transport electrons, in terms of which the SO coupling can be probed by the zero-frequency cumulants. While the charge currents are not sensitive to the SO coupling. |
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Keywords: | A two-level quantum dot Rashba spin&ndash orbit coupling Super-Poissonian shot noise |
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