Generation of N-Qubit W State in N Separated Resonators via Resonant Interaction

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• 作者：Xin Wei (1)
  Mei-Feng Chen (1)
  
  1. Department of Physics ; Fuzhou University ; Fuzhou ; 350002 ; People鈥檚 Republic of China
  
• 关键词：W entangled state ; Circuit quantum electrodynamics(CQED)
• 刊名：International Journal of Theoretical Physics
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：54
• 期：3
• 页码：812-820
• 全文大小：487 KB
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• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Physics
  Quantum Physics
  Elementary Particles and Quantum Field Theory
  Mathematical and Computational Physics
  
• 出版者：Springer Netherlands
• ISSN：1572-9575

文摘

We propose a potentially practical scheme to generate a W state of N superconducting qubits (SQs) placed, respectively, in N separated transmission-line resonators (TLRs) which are coupled by a superconducting coupler qubit (SCQ). In our scheme, there is no need to apply any classical driving pulses during the whole operation process. The interaction between the SQs (SCQ) and the TLRs is resonant and the strong coupling between the SQs and the TLRs can be readily achieved, as a consequence the whole entanglement time is very short and we can obtain a high fidelity. Moreover, by using a SCQ as coupler qubit, our scheme can be controlled and implemented easily in experiment. The superconducting system is easy to be integrated, therefore our proposal can be useful in scalable distributed quantum networks.