In addition, the Doyle group developed a new technique for producing heavy, polar radical molecules in the cold and ultracold regime to search for new particles in the 10-100 TeV mass range.
[15] In addition, he has offered insights into the challenges of cooling molecules to their ground state, as well as the potential applications in fields such as quantum computing and precision measurement and particle physics.
[19] In addition, he and David Patterson developed a technique for detecting and quantifying chirality in gas-phase molecules using nonlinear resonant phase-sensitive microwave spectroscopy.
[20] In another line of work, Doyle and collaborators demonstrated the production of Bose-Einstein condensates of metastable helium using only buffer-gas loading into a magnetic trap combined with evaporative cooling.
His investigation on the magnetically trapped imidogen (NH) molecules and their collisions with both 3He and 4He isotopes provided insights into the interplay between molecular structure and collisional energy transfer at low temperatures.
[25] Moreover, by combining the techniques of Stark deceleration, magnetic trapping, and cryogenic buffer-gas cooling, he in collaboration with Jun Ye achieved the first experimental observation of cold collisions between two different species of state-selected neutral polar molecules.
[26] Together with David DeMille and Gerald Gabrielse as part of the ACME collaboration, Doyle made use of thorium monoxide (ThO) to measure the electron electric dipole moment (eEDM), achieving an upper limit of |d(e)| < 8.7 × 10-29 e·cm (90% confidence), significantly improving sensitivity and impacting extensions to the Standard Model at the multi-TeV scale.
[29] In the 1990s and 2000s, Doyle demonstrated buffer gas cooling for numerous atoms and small molecules, including VO, NH, CaF, CaH, and NH3.