Abstract
Noise-assisted transport phenomena highlight the nontrivial interplay between environmental effects and quantum coherence in achieving maximal efficiency. Due to the complexity of biochemical systems and their environments, effective open quantum system models capable of providing physical insights on the presence and role of quantum effects are highly needed. In this paper, we introduce a new approach that combines an effective quantum microscopic description with a classical stochastic one. Our stochastic collision model (SCM) describes both Markovian and non-Markovian dynamics without relying on the weak coupling assumption. We investigate the consequences of spatial and temporal heterogeneity of noise on transport efficiency in a fully connected graph and in the Fenna–Matthews–Olson (FMO) complex. Our approach shows how to meaningfully formulate questions, and provide answers, on important open issues such as the properties of optimal noise and the emergence of the network structure as a result of an evolutionary process.
Highlights
What is the realm of validity of quantum physics? Conceived as the most fundamental physical theory, describing the behavior of the constituents of our Universe, quantum physics has, since its very birth, pushed forward very intriguing fundamental questions of both philosophical and scientific nature
We introduce a new open quantum system approach that suitably combines quantum collision models and classical stochastic processes: the stochastic collision model (SCM)
The SCM is inspired by collision models, in which the system undergoes a series of unitary interactions with environmental ancillary qubits, resulting in an open system dynamics [16,17,18,19,20]
Summary
Dario A Chisholm1,2,∗ , Guillermo García-Perez2,3 , Matteo A C Rossi , G Massimo Palma and Sabrina Maniscalco. Turun Yliopisto, Finland 3 Complex Systems Research Group, Department of Mathematics and Statistics, University of Turku, FI-20014 Turun Yliopisto, Finland 4 NEST, Istituto Nanoscienze-CNR, Piazza S Silvestro 12, 56127 Pisa, Italy 5 QTF Centre of Excellence, Center for Quantum Engineering, Department of Applied Physics, Aalto University School of Science, FIN-00076 Aalto, Finland ∗ Author to whom any correspondence should be addressed
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