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A Semiclassical Framework for Mixed Quantum Classical Dynamics.

Shreyas Malpathak1, Matthew S Church2, Nandini Ananth1

  • 1Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University Ithaca, New York 14853, United States.

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Summary
This summary is machine-generated.

This study introduces modified Filinov filtration for mixed quantum-classical simulations. This method efficiently models complex chemical systems by adjusting quantum treatment for different parts of the system.

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Area of Science:

  • Computational Chemistry
  • Quantum Dynamics
  • Chemical Physics

Background:

  • Semiclassical (SC) approximations for quantum dynamics present a trade-off between accuracy and computational cost.
  • Existing methods are either highly accurate but expensive or computationally efficient but limited in describing quantum effects.

Purpose of the Study:

  • To develop a flexible mixed quantum-classical SC theory for complex chemical systems.
  • To enable accurate and efficient simulations of high-dimensional quantum processes.

Main Methods:

  • Introduction of modified Filinov filtration to construct mixed quantum-classical SC theories.
  • Application of different quantization levels to different subsystems without ad hoc interaction terms.

Main Results:

  • Demonstration of systematic tuning between quantum and classical SC behavior.
  • Development of a method that balances computational efficiency with accurate quantum effect description.

Conclusions:

  • Modified Filinov filtration offers a practical approach for simulating complex chemical dynamics.
  • This method provides a pathway to accurate and computationally efficient simulations of high-dimensional quantum processes.