Quantum control of trapped polyatomic molecules for eEDM searches

Area of Science:

• Quantum science
• Atomic and molecular physics
• Precision measurements

Background:

• Ultracold polyatomic molecules are crucial for quantum science and searches for new physics.
• Achieving full quantum control over molecular internal states is essential for these applications.
• Calcium monohydroxide (CaOH) is a promising candidate molecule.

Purpose of the Study:

• To establish coherent quantum control over individual quantum states in ultracold CaOH molecules.
• To demonstrate a novel method for searching for the electron electric dipole moment (eEDM).
• To enhance coherence times for precision measurements.

Main Methods:

• Optically trapping and preparing ultracold CaOH molecules in a single quantum state.
• Applying an electric field to polarize molecules and coherently transfer them to an eEDM-sensitive state.
• Performing electron spin precession measurements with tunable, near-zero magnetic field sensitivity.

Main Results:

• Successful coherent control of individual quantum states in CaOH was achieved.
• A viable method for eEDM searches using trapped polyatomic molecules was demonstrated.
• Extended coherence times were obtained using specially selected eEDM-sensitive states.

Conclusions:

• This work establishes a significant advancement in controlling ultracold polyatomic molecules.
• The demonstrated method provides a promising new avenue for eEDM searches.
• Future experiments can leverage these techniques for precision measurements beyond the Standard Model.