Quantum state transmission via a spin ladder as a robust data bus

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dc.creatorLi, Y.
dc.creatorShi, T.
dc.creatorChen, B.
dc.creatorSong, Z.
dc.creatorSun, C. P.
dc.date2004-06-22
dc.date.accessioned2026-07-07T06:22:16Z
dc.date.available2026-07-07T06:22:16Z
dc.descriptionWe explore the physical mechanism to coherently transfer the quantum information of spin by connecting two spins to an isotropic antiferromagnetic spin ladder system as data bus. Due to a large spin gap existing in such a perfect medium, the effective Hamiltonian of the two connected spins can be archived as that of Heisenberg type, which possesses a ground state with maximal entanglement. We show that the effective coupling strength is inversely proportional to the distance of the two spins and thus the quantum information can be transferred between the two spins separated by a longer distance, i.e. the characteristic time of quantum state transferring linearly depends on the distance.
dc.description7 pages, 5 figures, 1 table
dc.identifierhttps://arxiv.org/abs/quant-ph/0406159
dc.identifierhttp://arxiv.org/abs/quant-ph/0406159
dc.identifierPhys. Rev. A 71, 022301 (2005)
dc.identifierdoi:10.1103/PhysRevA.71.022301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95860
dc.subjectQuantum Physics
dc.subjectStrongly Correlated Electrons
dc.titleQuantum state transmission via a spin ladder as a robust data bus
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