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Calculation of Quantum Transition Probabilities between Codons and Concept of Biological Information

Ghasemi, Fatemeh | 2020

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 53041 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Shafiee, Afshin
  7. Abstract:
  8. It has been about a century since the introduction of the theory of quantum mechanics. This theory is a branch of physics that describes the behavior of nature in very small scales and microscopic systems . Since no quantum system is entirely isolated from its surroundings , it is necessary to study their interactions with the environment to understand them accurately. The theory of open quantum systems provides the theoretical and conceptual framework needed to consider these interactions. Then using the appropriate quantum operations , the evolution of the combined system can be investigated. Moreover , considering the environmental effects, some quantum features such as dissipation effects and quantum coherence can be studied. There are numerous quantum systems which can be investigated and understood using the theory of open quantum systems, including some quantum biological processes and several macroscopic quantum systems. In this thesis, first we have proposed some quantum mechanical approaches to study the point mutations caused by the formation of tautomeric states in the structure of DNA and have investigated the codon transitions . We have also calculated the quantum channel capacities for these codon transitions using the rules of quantum information theory. In the following, in order to control the dynamics of the quantum models for mutations and cancer, we have studied the observation of the Zeno effect in quantum macroscopic systems. Finally, because the exciton transfer in photosynthetic systems follows both quantum and classical mechanics, we started to study these systems using a macroscopic quantum approach. We have calculated the exciton transfer probability and the quantum efficiency in photosynthetic systems, using the theory of open quantum systems within an analytical framework
  9. Keywords:
  10. Open Quantum System ; Zeno Effect in Macroscopic Quantum Systems ; Point Mutations in DNA ; Quantum Efficiency in Photosynthetic Systems ; Decoherence ; Dissipation

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