Chemical reactions between ultracold $^{9}\mathrm{Be}^{+}$ ions and room-temperature molecular hydrogen isotopomers and between ultracold ${\mathrm{H}}_{3}^{+}$ ions and room-temperature ${\mathrm{O}}_{2}$ have been studied in a laser-cooling ion trap apparatus. For small Coulomb crystals of beryllium ions, reactions can be followed at the single-ion level. We demonstrate characterization of a chemical reaction in which neither one of the reactants nor the product is directly detectable. In this case molecular dynamics simulations were used for the determination of ion numbers from images of the $^{9}\mathrm{Be}^{+}$ ion ensemble. The observed reaction rates are in agreement with the Langevin ion-neutral reaction theory.Chemical reactions between ultracold $^{9}\mathrm{Be}^{+}$ ions and room-temperature molecular hydrogen isotopomers and between ultracold ${\mathrm{H}}_{3}^{+}$ ions and room-temperature ${\mathrm{O}}_{2}$ have been studied in a laser-cooling ion trap apparatus. For small Coulomb crystals of beryllium ions, reactions can be followed at the single-ion level. We demonstrate characterization of a chemical reaction in which neither one of the reactants nor the product is directly detectable. In this case molecular dynamics simulations were used for the determination of ion numbers from images of the $^{9}\mathrm{Be}^{+}$ ion ensemble. The observed reaction rates are in agreement with the Langevin ion-neutral reaction theory.

Physical Review AApr 19, 200680 citations

Control of Molecular Processes

Fabien Gatti, Benjamin Lasorne, Hans‐Dieter Meyer +1 more

Lecture notes in chemistryJan 1, 20175 citations

CHEMISTRY IN THE ULTRACOLD REGIME: PRECISION MOLECULAR ASSEMBLY AND TEST OF STATISTICAL REACTION DYNAMICS

Kang-Kuen Ni

Advances in quantum manipulation of molecules bring unique opportunities, including the use of molecules to search for new physics, harnessing molecular resources for quantum engineering, and exploring chemical reactions in the ultra-low temperature regime. In this talk, I will focus on the latter two topics. First, I will introduce our effort on building single ultracold molecules with full internal and motional state control in optical tweezers for future quantum simulators and computers. This work allows us to go beyond the usual paradigm of chemical reactions that proceed via stochastic encounters between reactants, to a single, controlled reaction of exactly two atoms. Second, I will present our work giving a detailed microscopic picture of molecules transforming from one species to another. We develop full quantum state mapping of chemical reaction product-pairs from single events, which we use to precisely benchmark statistical theory.Advances in quantum manipulation of molecules bring unique opportunities, including the use of molecules to search for new physics, harnessing molecular resources for quantum engineering, and exploring chemical reactions in the ultra-low temperature regime. In this talk, I will focus on the latter two topics. First, I will introduce our effort on building single ultracold molecules with full internal and motional state control in optical tweezers for future quantum simulators and computers. This work allows us to go beyond the usual paradigm of chemical reactions that proceed via stochastic encounters between reactants, to a single, controlled reaction of exactly two atoms. Second, I will present our work giving a detailed microscopic picture of molecules transforming from one species to another. We develop full quantum state mapping of chemical reaction product-pairs from single events, which we use to precisely benchmark statistical theory.

International Symposium on Molecular Spectroscopy (ISMS)Jun 20, 20220 citations

Chemical reactions between ultracold

^{9}\mathrm{Be}^{+}

ions and room-temperature molecular hydrogen isotopomers and between ultracold

{\mathrm{H}}_{3}^{+}

ions and room-temperature

{\mathrm{O}}_{2}

have been studied in a laser-cooling ion trap apparatus. For small Coulomb crystals of beryllium ions, reactions can be followed at the single-ion level. We demonstrate characterization of a chemical reaction in which neither one of the reactants nor the product is directly detectable. In this case molecular dynamics simulations were used for the determination of ion numbers from images of the

^{9}\mathrm{Be}^{+}

ion ensemble. The observed reaction rates are in agreement with the Langevin ion-neutral reaction theory.