Excited state dynamics in DNA double helices
| dc.creator | Bittner, Eric R. | |
| dc.date | 2006-06-13 | |
| dc.date | 2006-06-14 | |
| dc.date.accessioned | 2026-07-07T07:12:37Z | |
| dc.date.available | 2026-07-07T07:12:37Z | |
| dc.description | Recent ultrafast experiments have implicated that intrachain base-stacking rather than base-pairing mediate the fate and transport of photoexcited species in DNA chains. Here use an $SU(2)\otimes SU(2)$ lattice model which incorporates both intrachain and interchain electronic interactions to study the quantum mechanical evolution of an initial excitonic state placed on either the adenosine or thymidine side of a model B DNA poly(dA).poly(dT) duplex. Our calculations indicate that over several hundred femtoseconds, the adenosine exciton remains a cohesive excitonic wave packet on the adenosine side of the chain where as the thymidine exciton rapidly decomposes into mobile electron/hole pairs along the thymidine side of the chain. In both cases, the very little transfer to the other chain is seen over the time-scale of our calculations. We attribute the difference in these dynamics to the roughly 4:1 ratio of hole vs. electron mobility along the thymidine chain. | |
| dc.description | 4 pages, 3 figures. Corrected some typos/wording | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0606333 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0606333 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/112139 | |
| dc.subject | Soft Condensed Matter | |
| dc.subject | Biological Physics | |
| dc.title | Excited state dynamics in DNA double helices | |
| dc.type | text |