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arXiv · 1507.07164

Majorana modes in a triple-terminal Josephson junction with embedded parallel-coupled double quantum dots

Guang-Yu Yi·Xiao-Qi Wang·Zhen Gao·Hai-Na Wu·Wei-Jiang Gong
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Abstract

We investigate the Josephson effect in one triple-terminal junction with embedded parallel-coupled double quantum dots. It is found that the inter-superconductor supercurrent has opportunities to oscillate in $4π$ period, with the adjustment of the phase differences among the superconductors. What is notable is that such a result is robust and independent of fermion parities, intradot Coulomb strength, and the dot-superconductor coupling manner. By introducing the concept of spinful many-particle Majorana modes, we present the analytical definition of the Majorana operator via superposing electron and hole operators. It can be believed that this work provide a simple but feasible proposal for the realization of Majorana modes in a nonmagnetic system.

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Guang-Yu Yi, Xiao-Qi Wang, Zhen Gao, Hai-Na Wu, Wei-Jiang Gong. 2015-07-26. Majorana modes in a triple-terminal Josephson junction with embedded parallel-coupled double quantum dots. https://doi.org/10.1016/j.physe.2015.12.019

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