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Analysis of quantum coherence in biology

2020-04Journal article Restricted access
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dc.contributor.authorKhmelinskii, Igor
dc.contributor.authorMakarov, Vladimir, I
dc.date.accessioned2021-06-24T11:35:47Z
dc.date.available2021-06-24T11:35:47Z
dc.date.issued2020-04
dc.description.abstractWe reviewed the tools of quantum physics used in modeling of quantum coherence (QC) effects in different systems, including biological systems, which behave as quantum objects in some of their degrees of freedom. In particular, we considered the usage of the effective Hamiltonian (EH), Green's function (GF) and density matrix (DM) methods in the analysis of QC, focusing on QC in biological systems. We discussed the two main mechanisms of loss of quantum state coherence: (i) dephasing of the originally prepared coherent wave package and (ii) population relaxation in the same wave package. Dephasing does not affect the quantum state population, e.g. as in spin-spin relaxation, where dephasing is described by the tau(2) relaxation time. On the other hand, the state population relaxation of the spin wavepackage is attributed to spin-lattice relaxation and is described by the tau(1) relaxation time. Presently we discussed EH and GF formalisms in terms of the complex energy, dependent on intra- and intersystem interactions that induce state population relaxation. We provided a detailed analysis of these approaches for the exciton relaxation dynamics in a glycine polypeptide chain. The same phenomena were described in the DM formalism using the relaxation matrix. We discussed QC in different biological systems, showing that QC is conserved when the interactions of the coherent wavepackage with other degrees of freedom are weak, as otherwise population relaxation causes loss of QC. We believe that our results will be useful for the researchers in the area of quantum biology.
dc.description.sponsorshipPR NASA EPSCoR (NASA Cooperative Agreement) [80NSSC19M0049]
dc.description.sponsorshipPR Space Grant (NASA Training Grant) [NNX15AI11H]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.chemphys.2019.110671
dc.identifier.issn0301-0104
dc.identifier.urihttp://hdl.handle.net/10400.1/16537
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectEffective Hamiltonian
dc.subjectGreen's function
dc.subjectDensity matrix
dc.subjectExcitons
dc.subjectNeurons
dc.subjectPhotosynthesis
dc.subjectRetinal Muller cells
dc.subjectChemistry
dc.subjectPhysics
dc.titleAnalysis of quantum coherence in biology
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage110671
oaire.citation.titleChemical Physics
oaire.citation.volume532
person.familyNameKhmelinskii
person.givenNameIgor
person.identifier0000000420541031
person.identifier.ciencia-id0D1A-CB6C-6316
person.identifier.orcid0000-0002-6116-184X
person.identifier.ridC-9587-2011
person.identifier.scopus-author-id6701444934
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublicationfcb9f09f-2e99-41fb-8c08-7e1acbc65076
relation.isAuthorOfPublication.latestForDiscoveryfcb9f09f-2e99-41fb-8c08-7e1acbc65076

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