Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians
Fil: Buljubasich, Lisandro. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina.
| Main Authors: | , , , , , |
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| Format: | publishedVersion |
| Language: | eng |
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2022
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| Online Access: | http://hdl.handle.net/11086/23832 https://doi.org/10.1063/1.4934221 |
| _version_ | 1801213346756689920 |
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| author | Buljubasich, Lisandro Sánchez, Claudia M. Dente, Axel D. Levstein, Patricia R. Chattah, Ana K. Pastawski, Horacio M. |
| author_facet | Buljubasich, Lisandro Sánchez, Claudia M. Dente, Axel D. Levstein, Patricia R. Chattah, Ana K. Pastawski, Horacio M. |
| author_sort | Buljubasich, Lisandro |
| collection | Repositorio Digital Universitario |
| description | Fil: Buljubasich, Lisandro. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. |
| format | publishedVersion |
| id | rdu-unc.23832 |
| institution | Universidad Nacional de Cordoba |
| language | eng |
| publishDate | 2022 |
| record_format | dspace |
| spelling | rdu-unc.238322023-08-31T13:16:40Z Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians Buljubasich, Lisandro Sánchez, Claudia M. Dente, Axel D. Levstein, Patricia R. Chattah, Ana K. Pastawski, Horacio M. Sequence Analysis NMR Magnetic fields Loschmidt echo Decoherence publishedVersion Fil: Buljubasich, Lisandro. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Sánchez, Claudia M. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Dente, Axel D. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Levstein, Patricia R. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Chattah, Ana K. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Pastawski, Horacio M. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Buljubasich, Lisandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Dente, Axel D. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Levstein, Patricia R. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Chattah, Ana K. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Pastawski, Horacio M. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. We performed Loschmidt echo nuclear magnetic resonance experiments to study decoherence under a scaled dipolar Hamiltonian by means of a symmetrical time-reversal pulse sequence denominated Proportionally Refocused Loschmidt (PRL) echo. The many-spin system represented by the protons in polycristalline adamantane evolves through two steps of evolution characterized by the secular part of the dipolar Hamiltonian, scaled down with a factor |k| and opposite signs. The scaling factor can be varied continuously from 0 to 1/2, giving access to a range of complexity in the dynamics. The experimental results for the Loschmidt echoes showed a spreading of the decay rates that correlate directly to the scaling factors |k|, giving evidence that the decoherence is partially governed by the coherent dynamics. The average Hamiltonian theory was applied to give an insight into the spin dynamics during the pulse sequence. The calculations were performed for every single radio frequency block in contrast to the most widely used form. The first order of the average Hamiltonian numerically computed for an 8-spin system showed decay rates that progressively decrease as the secular dipolar Hamiltonian becomes weaker. Notably, the first order Hamiltonian term neglected by conventional calculations yielded an explanation for the ordering of the experimental decoherence rates. However, there is a strong overall decoherence observed in the experiments which is not reflected by the theoretical results. The fact that the non-inverted terms do not account for this effect is a challenging topic. A number of experiments to further explore the relation of the complete Hamiltonian with this dominant decoherence rate are proposed. publishedVersion Fil: Buljubasich, Lisandro. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Sánchez, Claudia M. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Dente, Axel D. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Levstein, Patricia R. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Chattah, Ana K. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Pastawski, Horacio M. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Fil: Buljubasich, Lisandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Dente, Axel D. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Levstein, Patricia R. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Chattah, Ana K. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Fil: Pastawski, Horacio M. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Física Enrique Gaviola; Argentina. Física Atómica, Molecular y Química (física de átomos y moléculas incluyendo colisión, interacción con radiación, resonancia magnética, Moessbauer Efecto.) 2022-04-12T18:45:14Z 2022-04-12T18:45:14Z 2015 article L. Buljubasich, C.M. Sánchez, A.D. Dente, P.R. Levstein, A.K. Chattah, H.M. Pastawski, Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians. J. Chem. Phys. 143, 164308 (2015) https://doi.org/10.1063/1.4934221 http://hdl.handle.net/11086/23832 https://doi.org/10.1063/1.4934221 eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Impreso; Electrónico y/o Digital ISSN: 0021-9606 |
| spellingShingle | Sequence Analysis NMR Magnetic fields Loschmidt echo Decoherence Buljubasich, Lisandro Sánchez, Claudia M. Dente, Axel D. Levstein, Patricia R. Chattah, Ana K. Pastawski, Horacio M. Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians |
| title | Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians |
| title_full | Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians |
| title_fullStr | Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians |
| title_full_unstemmed | Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians |
| title_short | Experimental quantification of decoherence via the Loschmidt echo in a many spin system with scaled dipolar Hamiltonians |
| title_sort | experimental quantification of decoherence via the loschmidt echo in a many spin system with scaled dipolar hamiltonians |
| topic | Sequence Analysis NMR Magnetic fields Loschmidt echo Decoherence |
| url | http://hdl.handle.net/11086/23832 https://doi.org/10.1063/1.4934221 |
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