Macroscopic Greenberg-Horne-Zeilinger state and W state in charge qubits based on Coulomb blockade
Department of Physics, National University of Defense Technology, Changsha, 410073, P.R. China
2 Department of Physics, Tsinghua University, 100084, Beijing, P.R. China
3 Tsinghua National Laboratory for Information Science and Technology, 100084, Beijing, P.R. China
Corresponding author: firstname.lastname@example.org
Published online: 26 January 2010
Based on Coulomb blockade, we propose a scheme to generate two types of three-qubit entanglement, known as Greenberg-Horne-Zeilinger (GHZ) state and W state, in a macroscopic quantum system. The qubit is encoded in the charge qubit in the superconducting system, and the scheme can be generalized to generate the GHZ state and W state in multi-partite charge qubits. The GHZ state and W state are the eigenstates of the respective idle Hamiltonian, so they have the long lifetime.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010