A Nanophotonic Computing Paradigm: Problem-Solving and Decision-Making Systems Using Spatiotemporal Photoexcitation Transfer Dynamics

  • Masashi AonoEmail author
  • Song-Ju KimEmail author
  • Makoto Naruse
  • Masamitsu Wakabayashi
  • Hirokazu Hori
  • Motoichi Ohtsu
  • Masahiko Hara
Part of the Nano-Optics and Nanophotonics book series (NON)


In contrast to conventional digital computers that operate as instructed by programmers, biological organisms solve problems and make decisions through intrinsic spatiotemporal dynamics in which their dynamic components process environmental information in a self-organized manner. Previously, we formulated two mathematical models of spatiotemporal dynamics by which the single-celled amoeba (a plasmodial slime mold), which exhibits complex spatiotemporal oscillatory dynamics and sophisticated computing capabilities, could solve a problem and make a decision by changing its amorphous shape in dynamic and uncertain environments. These models can also be implemented by various physical systems that exhibit suitable spatiotemporal dynamics resembling the amoeba’s shape-changing capability. Here we demonstrate that the photoexcitation transfer phenomena in certain quantum nanostructures mediated by optical near-field interactions mimic the amoeba-like spatiotemporal dynamics and can be used to solve two highly complex problems; the satisfiability problem, which is one of the most difficult combinatorial optimization problems, to determine whether a given logical proposition is self-consistent, and the multi-armed bandit problem, which is a decision-making problem in finding the most profitable option from among a number of options that provide rewards with different unknown probabilities. Our problem-solving and decision-making models exhibited better performances than conventionally known best algorithms. These demonstrations pave the way for a novel nanophotonic computing paradigm in which both coherent and dissipative processes are exploited for performing powerful solution searching and efficient decision-making with low energy consumption.


Slot Machine Lower Energy Level Satisfying Assignment Radiation Probability Bandit Problem 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Masashi Aono
    • 1
    Email author
  • Song-Ju Kim
    • 2
    Email author
  • Makoto Naruse
    • 3
    • 4
  • Masamitsu Wakabayashi
    • 5
  • Hirokazu Hori
    • 6
  • Motoichi Ohtsu
    • 4
    • 7
  • Masahiko Hara
    • 8
  1. 1.Earth-Life Science InstituteTokyo Institute of TechnologyMeguro-kuJapan
  2. 2.Atomic Electronics Group, WPI Center for Materials Nanoarchitectonics (MANA)National Institute for Materials Science (NIMS)TsukubaJapan
  3. 3.Photonic Network Research InstituteNational Institute of Information and Communications TechnologyTokyoJapan
  4. 4.Nanophotonics Research Center, Graduate School of EngineeringThe University of TokyoBunkyo-kuJapan
  5. 5.Department of Biomolecular EngineeringTokyo Institute of TechnologyMidori-kuJapan
  6. 6.Interdisciplinary Graduate School of Medicine and EngineeringUniversity of YamanashiKofuJapan
  7. 7.Department of Electrical Engineering and Information Systems Graduate School of EngineeringThe University of TokyoBunkyo-kuJapan
  8. 8. Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and EngineeringTokyo Institute of TechnologyMidori-kuJapan

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