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Quantum Phase Coherence in Mesoscopic Transport Devices with Two-Particle Interaction
Zhimei Wang1, Xiaofang Guo1, Haibin Xue2
1Institute of Theoretical Physics, Shanxi University, Shanxi, Taiyuan 030006, China.
Abstract:
In this paper we demonstrate a new type of quantum phase coherence (QPC), which is generated by the two-body interaction. This conclusion is based on quantum master equation analysis for the full counting statistics of electron transport through two parallel quantum-dots with antiparallel magnetic fluxes in order to eliminate the Aharonov-Bohm interference of either single-particle or non-interacting two-particle wave functions. The interacting two-particle QPC is realized by the flux-dependent oscillation of the zero-frequency cumulants including the shot noise and skewness with a characteristic period. The accurately quantized peaks of cumulant spectrum may have technical applications to probe the two-body Coulomb interaction.
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