Perfect Transfer of Entangled States on Spin Chain |
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Authors: | Jing-Ling Chen Qing-Liang Wang |
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Institution: | (1) Theoretical Physics Division, Chern Institute of Mathematics, Center for Combinatorics and LPMC, Nankai University, Tianjin, 300071, P.R. China |
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Abstract: | Current researches have shown that perfect states transfer over arbitrary distances is possible for a simple unmodulated spin
chain by some schemes. The transfer of a single qubit state has been investigated in detail by Christandl et al. Phys. Rev. Lett. 92, 187902(2004)] through a modified Heisenberg XX model Hamiltonian H
G
. The previous study of Christandl is restricted to the first-excitation states of H
G
(i.e., which correspond to the second subspace of the Hilbert space of H
G
). In this work, we extend their study to the case of the high-excitation states, and find that the entangled states in such
a form, | ψ 〉 = α | 00⋯ 0〉 + β | 11⋯ 1〉, can be perfectly transfered on the spin chain.
PACS numbers 03.67.Hk, 03.67.Pp, 05.50.+q. |
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Keywords: | perfect state transfer entangled states spin chain |
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