Detection of charge transfers in Cooper pair box

POSTER

Abstract

Cooper pair in a conventional superconductor (S) is composed of two spin-entangled electrons, and it may split into two non-superconductor (NS) regions via a process called crossed Andreev reflection. Such a spatially split entangled pair could be a quantum channel shared by two parties for quantum teleportation. However, several undesirable charge transfer processes are also involved at S/NS interfaces, such as quasi-particle tunneling, cotunneling, and ordinary Andreev reflection. In this poster we will discuss the importance of each charge transfer process in a system consisting of a superconducting island connected to two normal metal islands via two tunnel junctions, and inspect the efficiency of Cooper pair splitting in such scheme.

Authors

  • Chia-Heng Sun

    • Department of Physics, National Central University, Jhongli, Taiwan

  • Po-Chen Tai

    • Department of Physics, National Central University, Jhongli, Taiwan

  • Jheng-An Jiang

    • Department of Physics, National Changhua University of Education, Changhua, Taiwan

  • Cen-Shawn Wu

    • Department of Physics, National Changhua University of Education, Changhua, Taiwan

  • Jeng-Chung Chen

    • Department of Physics, National Tsing Hua University, Hsinchu, Taiwan

  • Yung-Fu Chen

    • Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
    • Department of Physics, National Central University, Jhongli, Taiwan