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Quantum dynamical concertedness: an entangled trajectory molecular dynamics study.

Aanchal Grover1, Srihari Keshavamurthy1

  • 1Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208 016, India. srihari@iitk.ac.in.

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This study explores double proton transfer reaction mechanisms. Quantum dynamics can alter dynamical concertedness, revealing deviations and the role of quantum entanglement in reaction pathways.

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Area of Science:

  • Chemical Dynamics
  • Quantum Mechanics
  • Reaction Mechanisms

Background:

  • Double proton transfer reactions are crucial in many chemical and biological processes.
  • Understanding reaction mechanisms, particularly dynamical concertedness, is essential for predicting reaction outcomes.

Purpose of the Study:

  • To investigate the reaction mechanism of double proton transfer.
  • To determine the influence of total energy on dynamical concertedness.
  • To explore how quantum dynamics affects the concept of dynamical concertedness.

Main Methods:

  • Classical dynamical analysis using delay time distributions.
  • Entangled trajectory molecular dynamics for quantum analysis.
  • Calculation of linear entropy to characterize quantum deviations.

Main Results:

  • Classical analysis shows fluctuations in dynamically concerted trajectories with energy.
  • Quantum dynamics reveals significant deviations from classical predictions in certain regimes.
  • Linear entropy suggests a role for quantum entanglement in observed quantum effects.

Conclusions:

  • The notion of dynamical concertedness is applicable but modified by quantum effects.
  • Quantum entanglement may play a significant role in the dynamics of double proton transfer.
  • Further research into quantum effects is needed for a complete understanding of reaction mechanisms.