Wed Sep 25 10:00:00 UTC 2024: ## Long-Lived Electronic Coherence in Molecules Observed Using Shaped Ultrafast Laser Pulses
**Scientists have discovered that electronic coherence in molecules can persist for a surprisingly long time despite complex vibrations within the molecule.** This groundbreaking discovery, published in *Physical Review A*, sheds light on the intricate interplay between electronic and nuclear degrees of freedom in molecules.
The researchers used shaped ultrafast laser pulses to create and probe entangled nuclear-electronic wave packets in molecules. Their experiments focused on thiophene, a sulfur-containing organic molecule. By carefully controlling the laser pulses, they were able to excite specific electronic states and monitor the evolution of the electronic coherence over time.
The results show that for certain pairs of electronic states, the electronic phase remains well-defined even as the molecule vibrates along numerous degrees of freedom. This long-lived coherence is modulated by the changing overlap between the vibrational wave functions of the two electronic states.
The findings were supported by both experimental measurements and theoretical calculations. The researchers were able to model the electronic coherence and its modulation by vibrations, providing a deeper understanding of the underlying physics.
This research has significant implications for the development of new technologies based on quantum phenomena in molecules. It opens up exciting avenues for controlling and manipulating electronic coherence in complex molecular systems, potentially leading to new applications in areas like quantum computing and photochemistry.
First Piper 