caa a22 4500 445868236 CHVBK 20180317145504.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1140/epjd/e2010-00258-5 doi (NATIONALLICENCE)springer-10.1140/epjd/e2010-00258-5 Implementing multi-qubit entanglement of two-level systems inside a superconducting phase qubit [Elektronische Daten] [L. B. Yu, Z.-Y. Xue, Z. D. Wang, Y. Yu, S. L. Zhu] Abstract.: The interaction between a superconducting phase qubit and the two-level systems located inside the Josephson tunnel barrier is described by the XY model, which is naturally used to implement the i-SWAP gate. With this gate, we propose a scheme to efficiently generate multi-qubit entangled states of such two-level systems, including multipartite Wstate and cluster states. In particular, it is found that, with the help of the phase qubit, the entanglement witness can be used to efficiently detect the produced multi-qubit entangled states. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2010 Yu L. B. Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal University, Guangzhou, P.R. China aut Xue Z.-Y Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal University, Guangzhou, P.R. China aut Wang Z. D. Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China aut Yu Y. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, P.R. China aut Zhu S. L. Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal University, Guangzhou, P.R. China aut The European Physical Journal D Springer-Verlag 61/2(2011-01-01), 499-505 1434-6060 61:2<499 2011 61 10053 https://doi.org/10.1140/epjd/e2010-00258-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2010-00258-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yu L. B. Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal University, Guangzhou, P.R. China aut NATIONALLICENCE 700 1- Xue Z.-Y Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal University, Guangzhou, P.R. China aut NATIONALLICENCE 700 1- Wang Z. D. Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China aut NATIONALLICENCE 700 1- Yu Y. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, P.R. China aut NATIONALLICENCE 700 1- Zhu S. L. Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal University, Guangzhou, P.R. China aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 61/2(2011-01-01), 499-505 1434-6060 61:2<499 2011 61 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer