Ground-state preparation of arbitrarily multipartite Dicke states in the one-dimensional ferromagnetic spin-(1/2) chain
- Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026 (China)
- School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China)
The preparation of arbitrary N-particle Dicke states in a one-dimensional N-qubit chain with nearest-neighbor XXZ interaction is investigated. We show by perturbation approach that each of the N+1 Dicke states can be approximately created as the nondegenerate ground state of the system when suitable external magnetic field and inter-qubit coupling are applied. In some small N situations, the perturbative results agree very well with the exact solutions. We further demonstrate by numerical methods that the proposed ground-state preparation of the Dicke states is robust against the finite temperature in the N=4 case. We also discuss the feasibility of our scheme in several physical systems including semiconductor quantum dots and an optical lattice.
- OSTI ID:
- 22080363
- Journal Information:
- Physical Review. A, Vol. 84, Issue 4; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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