Interference and Switching of Josephson current carried by nonlocal spin-entangled electrons in a SQUID-like system with quantum dots
Superconductivity
2011-11-15 v2 Mesoscale and Nanoscale Physics
Materials Science
Abstract
Josephson current of spin-entangled electrons through the two branches of a SQUID-like structure with two quantum dots exhibits a magnetic-flux response different from the conventional Josephson current. Due to their interference, the period of maximum Josephson current changes from to , which can be used for detecting the Cooper-pair splitting efficiency. The nonlocal spin entanglement provides a quantum mechanical functionale for switching on and off this novel Josephson current, and explicitly a switch is formulated by including a pilot junction. It is shown that the device can be used to measure the magnitude of split-tunneling Josephson current.
Keywords
Cite
@article{arxiv.1009.6028,
title = {Interference and Switching of Josephson current carried by nonlocal spin-entangled electrons in a SQUID-like system with quantum dots},
author = {Zhi Wang and Xiao Hu},
journal= {arXiv preprint arXiv:1009.6028},
year = {2011}
}
Comments
4 pages, 4 figures; to appear in Phys. Rev. Lett