Mediating and inducing quantum correlation between two separated qubits by one-dimensional plasmonic waveguide

  • Authors:

  • Qi-Liang He;Jing-Bo Xu;Dao-Xin Yao

  • Affiliations:

  • Physics Department, Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, People's Republic of China 310027 and School of Physics and Electronics, Guizhou Normal University, Guiyang ...;Physics Department, Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou, People's Republic of China 310027;State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou, People's Republic of China 510275

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2013

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Abstract

We investigate the dynamics of quantum correlation between two separated qubits trapped in one-dimensional plasmonic waveguide. It is found that for a class of initial states, the quantum discord shows a sudden change phenomenon during the dynamical evolution. Furthermore, we demonstrate that the quantum discord can be enhanced if a proper product of the plasmon wave number and two qubits distance is chosen. Finally, we find that the non-zero quantum discord between two qubits can be created for the states without initial quantum discord during the time evolution of the system.