Simulation of molecular spectroscopy with circuit quantum electrodynamics.

Area of Science:

• Quantum physics
• Molecular spectroscopy
• Computational chemistry

Background:

• Spectroscopy is vital for understanding quantum systems and molecular structure.
• Current molecular spectroscopy applications are limited to equilibrium states due to computational constraints.
• Quantum simulation offers a potential breakthrough for molecular spectroscopy.

Purpose of the Study:

• To experimentally demonstrate a quantum simulator for generating molecular spectra.
• To produce spectra for both equilibrium and non-equilibrium molecular states.
• To explore the capabilities of quantum simulation in molecular spectroscopy.

Main Methods:

• Utilized a superconducting quantum simulator.
• Employed a toy model to generate molecular spectra.
• Investigated diatomic molecules with varying electronic-vibronic coupling strengths.

Main Results:

• Successfully generated molecular spectra for both equilibrium and non-equilibrium states.
• Reliably produced the vibronic structure of diatomic molecules.
• Demonstrated applicability to molecules with a wide range of Huang-Rhys parameters.

Conclusions:

• Quantum simulation provides a new direction for predicting and understanding molecular spectroscopy.
• The developed quantum simulator overcomes limitations of traditional methods.
• This approach allows access to molecular spectra not readily available in laboratory conditions.