Dynamic nuclear polarization as kinetically constrained diffusion
Dynamic nuclear polarization (DNP) is a promising strategy for generating a significantly increased nonthermal spin polarization in nuclear magnetic resonance (NMR) and its applications that range from medicine diagnostics to material science. Being a genuine nonequilibrium effect, DNP circumvents t...
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| Format: | Article |
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American Physical Society
2015
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| Online Access: | https://eprints.nottingham.ac.uk/35271/ |
| _version_ | 1848795040748404736 |
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| author | Karabanov, Alexander Wiśniewski, Daniel Lesanovsky, Igor Köckenberger, Walter |
| author_facet | Karabanov, Alexander Wiśniewski, Daniel Lesanovsky, Igor Köckenberger, Walter |
| author_sort | Karabanov, Alexander |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Dynamic nuclear polarization (DNP) is a promising strategy for generating a significantly increased nonthermal spin polarization in nuclear magnetic resonance (NMR) and its applications that range from medicine diagnostics to material science. Being a genuine nonequilibrium effect, DNP circumvents the need for strong magnetic fields. However, despite intense research, a detailed theoretical understanding of the precise mechanism behind DNP is currently lacking. We address this issue by focusing on a simple instance of DNP—so-called solid effect DNP—which is formulated in terms of a quantum central spin model where a single electron is coupled to an ensemble of interacting nuclei. We show analytically that the nonequilibrium buildup of polarization heavily relies on a mechanism which can be interpreted as kinetically constrained diffusion. Beyond revealing this insight, our approach furthermore permits numerical studies of ensembles containing thousands of spins that are typically intractable when formulated in terms of a quantum master equation. We believe that this represents an important step forward in the quest of harnessing nonequilibrium many-body quantum physics for technological applications. |
| first_indexed | 2025-11-14T19:25:46Z |
| format | Article |
| id | nottingham-35271 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:25:46Z |
| publishDate | 2015 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-352712020-05-04T17:13:22Z https://eprints.nottingham.ac.uk/35271/ Dynamic nuclear polarization as kinetically constrained diffusion Karabanov, Alexander Wiśniewski, Daniel Lesanovsky, Igor Köckenberger, Walter Dynamic nuclear polarization (DNP) is a promising strategy for generating a significantly increased nonthermal spin polarization in nuclear magnetic resonance (NMR) and its applications that range from medicine diagnostics to material science. Being a genuine nonequilibrium effect, DNP circumvents the need for strong magnetic fields. However, despite intense research, a detailed theoretical understanding of the precise mechanism behind DNP is currently lacking. We address this issue by focusing on a simple instance of DNP—so-called solid effect DNP—which is formulated in terms of a quantum central spin model where a single electron is coupled to an ensemble of interacting nuclei. We show analytically that the nonequilibrium buildup of polarization heavily relies on a mechanism which can be interpreted as kinetically constrained diffusion. Beyond revealing this insight, our approach furthermore permits numerical studies of ensembles containing thousands of spins that are typically intractable when formulated in terms of a quantum master equation. We believe that this represents an important step forward in the quest of harnessing nonequilibrium many-body quantum physics for technological applications. American Physical Society 2015-07-10 Article PeerReviewed Karabanov, Alexander, Wiśniewski, Daniel, Lesanovsky, Igor and Köckenberger, Walter (2015) Dynamic nuclear polarization as kinetically constrained diffusion. Physical Review Letters, 115 (2). 020404/1-020404/5. ISSN 1079-7114 http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.020404 doi:10.1103/PhysRevLett.115.020404 doi:10.1103/PhysRevLett.115.020404 |
| spellingShingle | Karabanov, Alexander Wiśniewski, Daniel Lesanovsky, Igor Köckenberger, Walter Dynamic nuclear polarization as kinetically constrained diffusion |
| title | Dynamic nuclear polarization as kinetically constrained diffusion |
| title_full | Dynamic nuclear polarization as kinetically constrained diffusion |
| title_fullStr | Dynamic nuclear polarization as kinetically constrained diffusion |
| title_full_unstemmed | Dynamic nuclear polarization as kinetically constrained diffusion |
| title_short | Dynamic nuclear polarization as kinetically constrained diffusion |
| title_sort | dynamic nuclear polarization as kinetically constrained diffusion |
| url | https://eprints.nottingham.ac.uk/35271/ https://eprints.nottingham.ac.uk/35271/ https://eprints.nottingham.ac.uk/35271/ |