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Title: Decoherence and spin echo in biological systems

Journal Article · · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
 [1];  [2]
  1. Univ. de Guadalajara, Jalisco (Mexico). Dept. de Fısica, CUCEI
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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The spin-echo approach is extended to include biocomplexes for which the interaction with dynamical noise, produced by the protein environment, is strong. Significant restoration of the free induction decay signal due to homogeneous (decoherence) and inhomogeneous (dephasing) broadening is demonstrated analytically and numerically for both an individual dimer of interacting chlorophylls and for an ensemble of dimers. Here, our approach does not require the use of small interaction constants between the electron states and the protein fluctuations. It is based on an exact and closed system of ordinary differential equations that can be easily solved for a wide range of parameters that are relevant for bioapplications.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-06NA25396; 15349
OSTI ID:
1454986
Alternate ID(s):
OSTI ID: 1179714
Report Number(s):
LA-UR-15-20113; PLEEE8; TRN: US1901184
Journal Information:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, Vol. 91, Issue 5; ISSN 1539-3755
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (19)

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Non-Gaussian dephasing in flux qubits due to 1 ∕ f noise journal August 2007
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Quantum Effects in Biology book August 2014
Quantum nonequilibrium approach for fast electron transport in open systems: Photosynthetic reaction centers journal November 2011
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A hybrid stochastic hierarchy equations of motion approach to treat the low temperature dynamics of non-Markovian open quantum systems journal October 2013
Non-Hermitian approach for modeling of noise-assisted quantum electron transfer in photosynthetic complexes journal June 2012
Decoherence in a superconducting quantum bit circuit journal October 2005
Decoherence in qubits due to low-frequency noise journal February 2009
Effect of the conformational transitions on electron transfer in biological systems journal October 2004
Generalized Theory of Relaxation journal February 1957
Inhomogeneous Broadening Induced Long-Lived Integrated Two-Color Coherence Photon Echo Signal journal July 2014
Modeling of low- and high-frequency noise by slow and fast fluctuators journal May 2012

Figures / Tables (6)

FIG. 1(p. 7)figure FIG. 1
FIG. 2(p. 7)figure FIG. 2
FIG. 3(p. 8)figure FIG. 3
FIG. 4(p. 8)figure FIG. 4
FIG. 5(p. 10)figure FIG. 5
FIG. 6(p. 10)figure FIG. 6

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