Generation of macroscopic entangled states in coupled superconducting phase qubits

Shigemasa Matsuo, Sahel Ashhab, Toshiyuki Fujii, Franco Nori, Katsuhiko Nagai, Noriyuki Hatakenaka

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22 Citations (Scopus)


We consider the possibility of generating macroscopic entangled states in capacitively coupled phase qubits. First we discuss the operation of phase qubits and the implementation of the basic gate operations in them. We then analyze two possible procedures that can be used to generate n-qubit entangled states, such as the Greenberger-Horne-Zeilinger state for the case n = 3. The procedures we propose are constructed under the experimentally motivated constraint of trying to minimize the number of control lines used to manipulate the qubits.

Original languageEnglish
Article number054802
JournalJournal of the Physical Society of Japan
Issue number5
Publication statusPublished - 1 May 2007
Externally publishedYes


  • Entangled states
  • Greenberger-Horne-Zeilinger state
  • Phase qubit
  • Quantum circuit

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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