Quantum control and precision measurement of molecular vibrational states
Abstract
Trapping, cooling, and preparation in a pure quantum state, as well as coherent control of the rotation of a diatomic CaH-positive molecular ion, were recently realized in proof-of-principle experiments based on techniques derived from quantum-logic spectroscopy. The experimental protocol is applicable to a broad range of molecular species and molecular vibrations. This may open a wide selection of molecular transitions in the telecom band suitable for transducing quantum information between atomic ions (and other stationary quantum memories) and telecom photons (flying qubits) in a quantum network. Furthermore, extensive and precise measurements of rotational and vibrational transitions of molecules may be useful to construct and benchmark Potential Energy Surfaces (PESs) with unprecedented detail and improve knowledge of the properties and quantum behavior of molecules. The goal of this proposal is to expand the molecular ion control to include molecular vibrational states. We propose to develop a frequency comb light source suitable to search for a certain vibrational overtone transition of CaH-positive in the telecom band (year 1) and evaluate its suitability for use in a quantum network. In year 2, we plan to build a dual-comb setup and use it to perform coherent, stimulated-Raman excitation of several vibrational transitions in CaH-positive. The precision of vibrational spectroscopy for CaH-positive will be improved in year 3 and the results can in turn be utilized to refine PES reconstruction.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 22, 2024
- Source ID
- FA95502310035
Entities
People
- Scott A. Diddams
Organizations
- Air Force Office of Scientific Research
- Regents of the University of Colorado
- United States Air Force