Effective cutting of a quantum spin chain by bond impurities
| Autor: | Alessandro Cuccoli, Leonardo Banchi, Tony J. G. Apollaro, Francesco Plastina, Mauro Paternostro, Paola Verrucchi, R. Vaia |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
FOS: Physical sciences
MAGNETS Quantum entanglement Ring (chemistry) OSCILLATIONS Figure of merit quantum communication XY CHAIN Quantum information science Spin (physics) ENTANGLEMENT Physics bond impurity Quantum Physics Condensed matter physics Spins Scattering LOCAL MAGNETIZATION STATE Atomic and Molecular Physics and Optics QUBITS Condensed Matter - Other Condensed Matter quantum spin chain Qubit Quantum Physics (quant-ph) Other Condensed Matter (cond-mat.other) |
| Zdroj: | Physical review. A 88 (2013): 052336-1–052336-7. doi:10.1103/PhysRevA.88.052336 info:cnr-pdr/source/autori:T.J.G. Apollaro (1,); F. Plastina (1); L. Banchi (3,4); A. Cuccoli (5,6); R. Vaia (6,7); P. Verrucchi (5,6,7); M. Paternostro (2,8)/titolo:Effective cutting of a quantum spin chain by bond impurities/doi:10.1103%2FPhysRevA.88.052336/rivista:Physical review. A/anno:2013/pagina_da:052336-1/pagina_a:052336-7/intervallo_pagine:052336-1–052336-7/volume:88 Apollaro, T J G, Plastina, F, Banchi, L, Cuccoli, A, Vaia, R, Verrucchi, P & Paternostro, M 2013, ' Effective cutting of a quantum spin chain by bond impurities ', Physical Review A (Atomic, Molecular, and Optical Physics), vol. 88, no. 5, 052336 . https://doi.org/10.1103/PhysRevA.88.052336 |
| Popis: | Spin chains are promising media for short-haul quantum communication. Their usefulness is manifested in all those situations where stationary information carriers are involved. In the majority of the communication schemes relying on quantum spin chains, the latter are assumed to be finite in length, with well addressable end-chain spins. In this paper we propose that such configuration could actually be achieved by a mechanism that is able to effectively cut a spin ring through the insertion of bond defects. We then show how suitable physical quantities can be identified as figures of merit for the effectiveness of the cut. We find that, even for modest strengths of the bond defect, a ring is effectively cut at the defect site. In turn, this has important effects on the amount of correlations shared by the spins across the resulting chain, which we study by means of a scattering-based mechanism of a clear physical interpretation. 7 pages; revised version, jour. ref. added |
| Databáze: | OpenAIRE |
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