The Physical Mechanism Of The Primary Process Of Photosynthesis In Bacteria

Photosynthesis is the process by which plants and other organic matter convert light energy into stable chemical energy and release fuel for the organism's life activities.The original stage of photosynthesis is the absorption of light by the light-concentrating compound,and then through the excitation relaxation to the reaction center(Reaction Center,Abbreviation to RC),this stage is the most critical stage for photosynthesis to efficiently capture light.In recent years,more and more scientists are committed to quantum coherence research on the effects of photosynthesis energy transfer,especially the energy transfer efficiency in the initial stage of photosynthesis.This stage of research can enable us to maximize the use of light energy.The role of natural resources will play an important role in the future development of new energy in China and the world.It will also provide a theoretical reference for future research on photosynthesis excitation energy transfer(Abbreviation to EET).There are two functions of quantum decoherence and damping between the system and the environment.Because of the fast speed and short time of photosynthesis energy transfer,quantum decoherence caused by environmental noise plays a major role in energy transfer.In this paper,the original process EET of bacterial photosynthesis,was used as the research object.We used the solvable decoherence model(we can obtain the analytical solution of this model and avoid errors due to digital calculation)to calculate,whether the presence or absence of ambient noise,the energy transfer efficiency of one excitation site to all sites changes with time of 16-site particles in the B850 ring of the harvesting complex II(Abbreviation to LH-II).The results of the study indicate that regardless of the presence or absence of environmental noise,the time-dependent changes in the energy transfer efficiency all lead to the fact that the energy transfer efficiency between the excited site and the adjacent two ground state sites is greater than that of the non-adjacent sites because of the excited bit is more closely coupled to the adjacent ground state sites.By comparing the energy transfer efficiency with time in the presence and absence of ambient noise,it is concluded that in the presence of environmental noise,the stimulated energy transfer efficiency changes rapidly during the initial stage,there is no stable value,and the coupling with the environment is stable after a long time.In the absence of environmental noise,the energy transfer efficiency is always in vibration and there will not be a stable value.Then we can conclude that environmental noise can increase the vibration frequency and make LH-II have a stable energy transfer efficiency after a long time;therefore,it is concluded that the environmental noise contributes to energy transfer during photosynthesis.