Spectroscopy and quantum control of cryogenically buffered polyatomic molecules

Cold polyatomic molecules offer rich possibilities for precision measurement, quantum control, and tests of fundamental symmetries.~ While manipulating, cooling, and detecting atoms and certain diatomic molecules at the single quantum state level is now possible, analogous tools for controlling polyatomic molecules lag far behind.~ Buffer gas cooling has emerged as a versatile tool for cooling such molecules.~ We will present recent demonstrations of state-specific and enantiomer-specific preparation of chiral molecules, and novel sensitive and ultra-specific chemical analysis techniques enabled by the combination of modern microwave spectroscopy techniques and the broad applicability of cryogenically buffered molecular samples.~