Quantum communication in spin systems with long-range interactions

Avellino, M.; Fisher, A. J.; Bose, Sougato

doi:10.1103/physreva.74.012321

Cited by 56 publications

(25 citation statements)

References 23 publications

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“…Next we explore the effect on the remote gate of unwanted longer range interactions [27,28], which could be an issue when considering pseudospins based on charge degrees of freedom. We add to Eq.…”

Section: Errors and Decoherencementioning

confidence: 99%

Knitting distributed cluster-state ladders with spin chains

2011

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Recently there has been much study on the application of spin chains to quantum state transfer and communication. Here we discuss the utilization of spin chains (set up for perfect quantum state transfer) for the knitting of distributed cluster-state structures, between spin qubits repeatedly injected and extracted at the ends of the chain. The cluster states emerge from the natural evolution of the system across different excitation number sectors. We discuss the decohering effects of errors in the injection and extraction process as well as the effects of fabrication and random errors.

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Section: Errors and Decoherencementioning

confidence: 99%

Knitting distributed cluster-state ladders with spin chains

2011

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“…By construction, these Hamiltonians ensure the faithful communication through the unbent chain, whereas their performance in the presence of bends is not known, and will be discussed here. In many physical realizations, the coupling between two adjacent sites is directly related to their spatial separation (e.g., see [6][7][8]). Hence, interactions beyond NNs are expected to be enhanced in the neighborhood of bends, disturbing the communication.…”

Section: Introductionmentioning

confidence: 99%

Analysis and minimization of bending losses in discrete quantum networks

2012

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We study theoretically the transfer of quantum information along bends in two-dimensional discrete lattices. Our analysis shows that the fidelity of the transfer decreases considerably, as a result of interactions in the neighbourhood of the bend. It is also demonstrated that such losses can be controlled efficiently by the inclusion of a defect. The present results are of relevance to various physical implementations of quantum networks, where geometric imperfections with finite spatial extent may arise as a result of bending, residual stress, etc

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“…6,11 Moreover, one-dimensional spin chains show strong potentials in quantum communications. [19][20][21][22][23] Especially, the magnetic atomic strings, where the atoms are separated by a fixed distance, are predicted to have both high speed and high fidelity in quantum information transfer. 20,21 The prototype device was recently demonstrated experimentally through the spin strings built by STM atomic manipulation.…”

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confidence: 99%

“…[19][20][21][22][23] Especially, the magnetic atomic strings, where the atoms are separated by a fixed distance, are predicted to have both high speed and high fidelity in quantum information transfer. 20,21 The prototype device was recently demonstrated experimentally through the spin strings built by STM atomic manipulation. 22,23 One dimensional Fe atomic strings have also been self-assembled on vicinal Cu(111) surfaces.…”

mentioning

confidence: 99%