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Area of Science:

  • Quantum optics
  • Theoretical chemistry
  • Computational physics

Background:

  • Strong coupling of optical cavities and molecular matter enables control over chemical processes.
  • Accurate, scalable numerical methods are needed for simulating cavity-modified chemical dynamics.

Purpose of the Study:

  • To evaluate quasiclassical mapping Hamiltonian methods for simulating cavity-modified dynamics.
  • To test the accuracy and efficiency of linearized semiclassical (LSC) methods.

Main Methods:

  • Simulated spontaneous emission dynamics of an atom in a microcavity.
  • Employed five variations of the linearized semiclassical (LSC) method.
  • Compared LSC variations against Ehrenfest and standard LSC methods.

Main Results:

  • Recently proposed LSC methods using a modified identity operator show reasonable accuracy.
  • These LSC variations outperform standard LSC and Ehrenfest methods.
  • Computational costs are not significantly increased by the improved LSC methods.

Conclusions:

  • LSC methods with a modified identity operator are promising for simulating cavity-modified dynamics.
  • These methods offer a cost-effective and accurate approach for complex chemical systems.
  • The developed methods are suitable for general-purpose simulation of quantum-controlled chemistry.