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Macroscopic Greenberg-Horne-Zeilinger state and W state in charge qubits based on Coulomb blockade |
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| Authors: | L M Liang X B Wang |
| Institution: | 1. 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 |
| Abstract: | 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. |
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