2020/08/22 by Zeyu Zhou, Zhou, Zeyu, Joseph E. Subotnik +3
Physics and Astronomy · #Chemical Physics (physics.chem-ph) #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Mechanical and Optical Resonators #Quantum Mechanics and Applications
paper · pdf · doi:10.48550/arxiv.2008.09752
openalex publication_date 2020/08/22 · openalex created_date 2020/09/01 · openalex updated_date 2026/07/28
We propose a novel means to isolate and quantify the effects of Berry force on molecular dynamics using two reasonably strong continuous wave (CW) laser fields with frequencies ω and 2ω. For molecules or materials with three frequency-matching bright transitions (|0⟩→|1⟩, |1⟩→|2⟩, |0⟩→|2⟩) at frequencies (ω, ω, 2ω) respectively, the effects of Berry curvature can be isolated by varying the phase between the two laser fields (Δϕ) and monitoring the dynamics. Moreover, we find that the resulting chemical dynamics can depend critically on the sign of Δϕ; in other words, the effects of Berry curvature can be enormous. Thus, this manuscript represents an unusual step forward towards using light-matter interactions to affect chemical dynamics, suggesting that topological concepts usually invoked in adiabatic quantum optics and condensed matter can be directly applied to non-adiabatic chemical excited state dynamics.