From perfect to fractal transmission in spin chains

Gabriele De Chiara, D. Rossini, S. Montangero, R. Fazio

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)


Perfect state transfer is possible in modulated spin chains [Phys. Rev. Lett. 92, 187902 (2004)], imperfections, however, are likely to corrupt the state transfer. We study the robustness of this quantum communication protocol in the presence of disorder both in the exchange couplings between the spins and in the local magnetic field. The degradation of the fidelity can be suitably expressed, as a function of the level of imperfection and the length of the chain, in a scaling form. In addition the time signal of fidelity becomes fractal. We further characterize the state transfer by analyzing the spectral properties of the Hamiltonian of the spin chain.
Original languageEnglish
Article number012323
JournalPhysical Review A
Issue number1
Publication statusPublished - Jul 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)


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