SKM 2021 – scientific programme

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BP: Fachverband Biologische Physik

BP 4: Posters Biological Physics

BP 4.5: Poster

Thursday, September 30, 2021, 11:15–12:15, P

Epigenetic relevance of quantum phenomena in DNA — •Mirko Rossini and Joachim Ankerhold — Institute for Complex Quantum systems and IQST, Ulm University, Germany

The behaviour of excited particles along the DNA strand inside a cell has been a topic of foremost interest in the field of biophysics in the last 20 years. On one hand, understanding how the dynamics of such particles can affect the geometry and structural properties of the DNA, locally or globally, can lead to new insights in the field of epigenetics [1]. On the other hand, the DNA strand itself has been analysed to explore its potential as a molecular conducting nano-wire.

With this poster we provide a description of different tight-binding models with dissipative background, exploring their population dynamics and coherence properties. The choice of the parameters for the models is taken to mimic some specific DNA sequences which are relevant in the epigenetic field of research. We provide then some experimental results which justify our interest in this topic and in this methods. Apart from single charge dynamics, we also consider excitonic dynamics in various DNA sequences, in particular with respect to charge separation and localization.

[1] E. R. Bittner, J. Chem. Phys. 125, 094909 (2006).