Symmetry-enhanced supertransfer of delocalized quantum states
Coherent hopping of excitation relies on quantum coherence over physically extended states. In this work, we consider simple models to examine the effect of symmetries of delocalized multi-excitation states on the dynamical timescales, including hopping rates, radiative decay and environmental inter...
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/71244 |
| _version_ | 1826208691069648896 |
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| author | Lloyd, Seth Mohseni, Masoud |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Lloyd, Seth Mohseni, Masoud |
| author_sort | Lloyd, Seth |
| collection | MIT |
| description | Coherent hopping of excitation relies on quantum coherence over physically extended states. In this work, we consider simple models to examine the effect of symmetries of delocalized multi-excitation states on the dynamical timescales, including hopping rates, radiative decay and environmental interactions. While the decoherence (pure dephasing) rate of an extended state over N sites is comparable to that of a non-extended state, superradiance leads to a factor of N enhancement in decay and absorption rates. In addition to superradiance, we illustrate how the multi-excitonic states exhibit 'supertransfer' in the far-field regime—hopping from a symmetrized state over N sites to a symmetrized state over M sites at a rate proportional to MN. We argue that such symmetries could play an operational role in physical systems based on the competition between symmetry-enhanced interactions and localized inhomogeneities and environmental interactions that destroy symmetry. As an example, we propose that supertransfer and coherent hopping play a role in recent observations of anomalously long diffusion lengths in nano-engineered assembly of light-harvesting complexes. |
| first_indexed | 2024-09-23T14:10:09Z |
| format | Article |
| id | mit-1721.1/71244 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:10:09Z |
| publishDate | 2012 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/712442022-10-01T19:34:40Z Symmetry-enhanced supertransfer of delocalized quantum states Lloyd, Seth Mohseni, Masoud Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Research Laboratory of Electronics W. M. Keck Foundation Center for Extreme Quantum Information Theory Lloyd, Seth Lloyd, Seth Mohseni, Masoud Coherent hopping of excitation relies on quantum coherence over physically extended states. In this work, we consider simple models to examine the effect of symmetries of delocalized multi-excitation states on the dynamical timescales, including hopping rates, radiative decay and environmental interactions. While the decoherence (pure dephasing) rate of an extended state over N sites is comparable to that of a non-extended state, superradiance leads to a factor of N enhancement in decay and absorption rates. In addition to superradiance, we illustrate how the multi-excitonic states exhibit 'supertransfer' in the far-field regime—hopping from a symmetrized state over N sites to a symmetrized state over M sites at a rate proportional to MN. We argue that such symmetries could play an operational role in physical systems based on the competition between symmetry-enhanced interactions and localized inhomogeneities and environmental interactions that destroy symmetry. As an example, we propose that supertransfer and coherent hopping play a role in recent observations of anomalously long diffusion lengths in nano-engineered assembly of light-harvesting complexes. W. M. Keck Foundation Center for Extreme Quantum Information Theory Natural Sciences and Engineering Research Council of Canada (NSERC) Lockheed Martin United States. Defense Advanced Research Projects Agency 2012-06-28T13:01:17Z 2012-06-28T13:01:17Z 2010-07 2010-02 Article http://purl.org/eprint/type/JournalArticle 1367-2630 http://hdl.handle.net/1721.1/71244 Lloyd, Seth, and Masoud Mohseni. “Symmetry-enhanced Supertransfer of Delocalized Quantum States.” New Journal of Physics 12.7 (2010): 075020. © IOP Publishing 2010 en_US http://dx.doi.org/10.1088/1367-2630/12/7/075020 New Journal of Physics Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ application/pdf IOP Publishing New Journal of Physics |
| spellingShingle | Lloyd, Seth Mohseni, Masoud Symmetry-enhanced supertransfer of delocalized quantum states |
| title | Symmetry-enhanced supertransfer of delocalized quantum states |
| title_full | Symmetry-enhanced supertransfer of delocalized quantum states |
| title_fullStr | Symmetry-enhanced supertransfer of delocalized quantum states |
| title_full_unstemmed | Symmetry-enhanced supertransfer of delocalized quantum states |
| title_short | Symmetry-enhanced supertransfer of delocalized quantum states |
| title_sort | symmetry enhanced supertransfer of delocalized quantum states |
| url | http://hdl.handle.net/1721.1/71244 |
| work_keys_str_mv | AT lloydseth symmetryenhancedsupertransferofdelocalizedquantumstates AT mohsenimasoud symmetryenhancedsupertransferofdelocalizedquantumstates |