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A versatile coherent Ising computing platform.

Hai Wei1, Chengjun Ai2, Putuo Guo2

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Coherent Ising machines (CIMs) demonstrate enhanced accuracy and stability for solving complex problems. Experimental results show a 55% success rate in finding optimal solutions, proving practical applicability.

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Area of Science:

  • Quantum computing
  • Computational physics
  • Optimization algorithms

Background:

  • Coherent Ising machines (CIMs) are hybrid quantum devices for NP-complete problems.
  • CIMs face challenges like noise-induced local minima affecting accuracy.
  • Previous CIM implementations have limitations in performance and stability.

Purpose of the Study:

  • To improve the computational accuracy and stability of CIMs.
  • To demonstrate a practical, high-performance CIM through experimental validation.
  • To explore the application of CIMs in real-world scenarios.

Main Methods:

  • Experimental demonstration of CIM using femtosecond laser pumping.
  • Integration of optical and structural optimization strategies.
  • Utilizing Möbius Ladder graphs (100 vertices) for problem-solving evaluation.

Main Results:

  • Achieved a 55% success rate in identifying optimal solutions for a 100-vertex Möbius Ladder graph.
  • Femtosecond laser pulses enhanced quantum effects and reduced pump power in fiber-based CIMs.
  • Maintained a high success rate for 8 continuous hours, demonstrating practical applicability.

Conclusions:

  • The femtosecond laser-pumped CIM significantly enhances performance and stability.
  • CIMs show promise for practical applications like molecular docking and credit scoring.
  • This research validates the theoretical potential of CIMs for large-scale integration.