Related Experiment Video
Updated: Aug 6, 2026
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Unveiling chiral electron-photon correlation effects in circularly polarized optical devices
Yassir El Moutaoukal1, Rosario R Riso1, Andrea Bianchi2
1Department of Chemistry, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
The Journal of Chemical Physics
|July 16, 2026
Summary
We developed a mean-field theory to describe electron-photon interactions in chiral cavities, crucial for manipulating molecular chirality. The theory captures cavity effects but not the chiral discrimination from light-matter interactions.
Area of Science:
- Quantum chemistry
- Molecular chirality
- Cavity quantum electrodynamics
Background:
- Strong coupling between molecules and light is key to controlling molecular chirality.
- Experimental progress in chiral cavities necessitates a theoretical framework for electron-photon interactions.
Purpose of the Study:
- To develop a mean-field theoretical framework for electron-photon interactions in chiral cavities.
- To enable systematic improvement for capturing chiral correlation effects.
Main Methods:
- Strong coupling Møller-Plesset perturbation theory.
- Analysis of electron-photon excitation manifolds.
- Application to selected chiral systems.
Main Results:
- The developed mean-field theory successfully captures cavity frequency dispersion.
- The theory, in its current form, does not describe chiral discrimination.
- Further improvements are needed to account for coupled electron-photon excitations.
Conclusions:
- A foundational mean-field theory for chiral cavities has been established.
- The theory provides a basis for future investigations into enantioselective light-matter interactions.
- Limitations highlight the complexity of chiral discrimination mechanisms.
Related Concept Videos
02:24Properties of Enantiomers and Optical Activity
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
01:27π Electron Effects on Chemical Shift: Overview
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0, resulting in...
01:31Dielectric Polarization in a Capacitor
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
01:26Photochemical Electrocyclic Reactions: Stereochemistry
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
01:14π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as annulenes. In...
02:30Chirality in Nature
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid. The...