Modeling of the entangled states transfer processes in microtubule tryptophan system

• Published in: BioSystems 2023-09, Vol.231, p.104967-104967, Article 104967
• Main Authors: Shirmovsky, S.Eh, Chizhov, A.V.
• Format: Article
• Language: English
• Subjects: Coherent; Excitonic; Microtubule; Nonlinear dynamics; Quantum biology; Quantum entangled states; Quantum repeater
• ISSN: 0303-2647; 1872-8324
• DOI: 10.1016/j.biosystems.2023.104967

The paper simulates the process of the migration of a single energy excitation along a chain of tryptophans in cell microtubules connected by dipole–dipole interaction. The paper shows that the excited states propagation rate falls within the range of nerve impulse velocity. It was shown that such a process also causes a transfer of quantum entanglement between tryptophans, so that microtubules can be considered as signaling system, the basis for transmitting information via the quantum channel. The conditions under which the migration of entangled states in the microtubule is possible are obtained. In a certain sense, it allows us to argue that the signal function of tryptophans works as an analogue of a quantum repeater that transmits entangled states over microtubule by relaying through intermediate tryptophans. Thus, the paper shows that the tryptophan system can be considered as an environment that supports the existence of entangled states during the time comparable with the time of the processes in biosystems. •Energy transfer mechanisms in microtubules tryptophan system have been determined.•The conditions under which the migration of entangled states is possible are obtained.•The process of quantum entangled states migration between tryptophans has been considered.•Influence of the external environment on the entangled states migration has been analyzed.•The function of tryptophans working as an analogue of a quantum repeater is established.