Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin Bath
We analyze the influence of a two-state autocorrelated noise on the decoherence and on the tunneling Landau-Zener (LZ) transitions during a two-level crossing of a central electron spin (CES) coupled to a one dimensional anisotropic-antiferomagnetic spin, driven by a time-dependent global external m...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2014/526205 |
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| author | G. C. Fouokeng M. Tchoffo S. Moussiliou J. C. Ngana Kuetche Lukong Cornelius Fai Massou Siaka |
| author_facet | G. C. Fouokeng M. Tchoffo S. Moussiliou J. C. Ngana Kuetche Lukong Cornelius Fai Massou Siaka |
| author_sort | G. C. Fouokeng |
| collection | DOAJ |
| description | We analyze the influence of a two-state autocorrelated noise on the decoherence and on the tunneling Landau-Zener (LZ) transitions during a two-level crossing of a central electron spin (CES) coupled to a one dimensional anisotropic-antiferomagnetic spin, driven by a time-dependent global external magnetic field. The energy splitting of the coupled spin system is found through an approach that computes the noise-averaged frequency. At low magnetic field intensity, the decoherence (or entangled state) of a coupled spin system is dominated by the noise intensity. The effects of the magnetic field pulse and the spin gap antiferromagnetic material used suggest to us that they may be used as tools for the direct observation of the tunneling splitting through the LZ transitions in the sudden limit. We found that the dynamical frequencies display basin-like behavior decay with time, with the birth of entanglement, while the LZ transition probability shows Gaussian shape. |
| format | Article |
| id | doaj-art-eae4d1d74b3f4801a6a06ebd6e95cfa2 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-eae4d1d74b3f4801a6a06ebd6e95cfa22025-02-03T01:12:20ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242014-01-01201410.1155/2014/526205526205Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin BathG. C. Fouokeng0M. Tchoffo1S. Moussiliou2J. C. Ngana Kuetche3Lukong Cornelius Fai4Massou Siaka5Laboratory of Mesoscopic and Multilayer Structures, Department of Physics, University of Dschang, Dschang, CameroonLaboratory of Mesoscopic and Multilayer Structures, Department of Physics, University of Dschang, Dschang, CameroonDepartement de Physique, Faculte des Sciences et Technique, Universite d’Abomey-Calavi, 06 BP 48 Cotonou, BeninLaboratory of Mesoscopic and Multilayer Structures, Department of Physics, University of Dschang, Dschang, CameroonLaboratory of Mesoscopic and Multilayer Structures, Department of Physics, University of Dschang, Dschang, CameroonDepartement de Physique, Faculte des Sciences et Technique, Universite d’Abomey-Calavi, 06 BP 48 Cotonou, BeninWe analyze the influence of a two-state autocorrelated noise on the decoherence and on the tunneling Landau-Zener (LZ) transitions during a two-level crossing of a central electron spin (CES) coupled to a one dimensional anisotropic-antiferomagnetic spin, driven by a time-dependent global external magnetic field. The energy splitting of the coupled spin system is found through an approach that computes the noise-averaged frequency. At low magnetic field intensity, the decoherence (or entangled state) of a coupled spin system is dominated by the noise intensity. The effects of the magnetic field pulse and the spin gap antiferromagnetic material used suggest to us that they may be used as tools for the direct observation of the tunneling splitting through the LZ transitions in the sudden limit. We found that the dynamical frequencies display basin-like behavior decay with time, with the birth of entanglement, while the LZ transition probability shows Gaussian shape.http://dx.doi.org/10.1155/2014/526205 |
| spellingShingle | G. C. Fouokeng M. Tchoffo S. Moussiliou J. C. Ngana Kuetche Lukong Cornelius Fai Massou Siaka Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin Bath Advances in Condensed Matter Physics |
| title | Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin Bath |
| title_full | Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin Bath |
| title_fullStr | Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin Bath |
| title_full_unstemmed | Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin Bath |
| title_short | Effect of Noise on the Decoherence of a Central Electron Spin Coupled to an Antiferromagnetic Spin Bath |
| title_sort | effect of noise on the decoherence of a central electron spin coupled to an antiferromagnetic spin bath |
| url | http://dx.doi.org/10.1155/2014/526205 |
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