[ { "id": "authors:g5ns4-9rc08", "collection": "authors", "collection_id": "g5ns4-9rc08", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20220707-204114065", "type": "monograph", "title": "Multivalent optical cycling centers in polyatomic molecules", "author": [ { "family_name": "Yu", "given_name": "Phelan", "orcid": "0000-0002-3715-9133", "clpid": "Yu-Phelan" }, { "family_name": "Lopez", "given_name": "Adrian", "clpid": "Lopez-Adrian-A" }, { "family_name": "Goddard", "given_name": "William A., III", "orcid": "0000-0003-0097-5716", "clpid": "Goddard-W-A-III" }, { "family_name": "Hutzler", "given_name": "Nicholas R.", "orcid": "0000-0002-5203-3635", "clpid": "Hutzler-N-R" } ], "abstract": "Optical control of polyatomic molecules promises new opportunities in precision metrology, fundamental chemistry, quantum information, and many-body science. Contemporary experimental and theoretical efforts have mostly focused on cycling photons via excitation of a single electron localized to an alkaline earth (group 2)-like metal center. In this manuscript, we consider pathways towards optical cycling in polyatomic molecules with multi-electron degrees of freedom, which arise from two or more cycling electrons localized to p-block post-transition metal and metalloid (group 13, 14, and 15) centers. We characterize the electronic structure and rovibrational branching of several prototypical candidates using ab initio quantum chemical methods. Despite increased internal complexity and challenging design parameters, we find several molecules possessing quasi-closed photon cycling schemes with highly diagonal, visible and near-infrared transitions. Furthermore, we identify new heuristics for engineering optically controllable and laser-coolable polyatomic molecules with multi-electron cycling centers. Our results help elucidate the interplay between hybridization, repulsion, and ionicity in optically active species and provide a first step towards using polyatomic molecules with complex electronic structure as a resource for quantum science and measurement.", "doi": "10.48550/arXiv.arXiv.2205.11860", "publisher": "arXiv", "publication_date": "2022-05-24" }, { "id": "authors:wdyy4-tpd18", "collection": "authors", "collection_id": "wdyy4-tpd18", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201110-142039389", "type": "monograph", "title": "Searches for new sources of CP violation using molecules as quantum sensors", "author": [ { "family_name": "Hutzler", "given_name": "N. R.", "orcid": "0000-0002-5203-3635", "clpid": "Hutzler-N-R" }, { "family_name": "Borschevsky", "given_name": "A.", "clpid": "Borschevsky-A" }, { "family_name": "Budker", "given_name": "D.", "clpid": "Budker-D" }, { "family_name": "DeMille", "given_name": "D.", "clpid": "DeMille-D" }, { "family_name": "Flambaum", "given_name": "V. V.", "clpid": "Flambaum-V-V" }, { "family_name": "Gabrielse", "given_name": "G.", "clpid": "Gabrielse-G" }, { "family_name": "Garcia Ruiz", "given_name": "R. F.", "clpid": "Garcia-Ruiz-R-F" }, { "family_name": "Jayich", "given_name": "A. M.", "clpid": "Jayich-A-M" }, { "family_name": "Orozco", "given_name": "L. A.", "clpid": "Orozco-L-A" }, { "family_name": "Ramsey-Musolf", "given_name": "M.", "orcid": "0000-0001-8110-2479", "clpid": "Ramsey-Musolf-M-J" }, { "family_name": "Reece", "given_name": "M.", "clpid": "Reece-M" }, { "family_name": "Safronova", "given_name": "M. S.", "clpid": "Safronova-M-S" }, { "family_name": "Singh", "given_name": "J. T.", "clpid": "Singh-J-T" }, { "family_name": "Tarbutt", "given_name": "M. R.", "clpid": "Tarbutt-M-T" }, { "family_name": "Zelevinsky", "given_name": "T.", "clpid": "Zelevinsky-T" } ], "abstract": "We discuss how molecule-based searches offer complementary probes to study the violation of fundamental symmetries. These experiments have the potential to probe not only the electron EDM, but also hadronic CPV phenomena. Future experimental developments will offer generic sensitivity to probe flavor neutral sources of both leptonic and hadronic CPV at scales of \u2265 100 TeV, and flavor changing CPV at scales of \u22651000 TeV.", "doi": "10.48550/arXiv.2010.08709", "publication_date": "2020-10-17" }, { "id": "authors:hyv1v-88622", "collection": "authors", "collection_id": "hyv1v-88622", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191218-113347116", "type": "monograph", "title": "Enhanced Yield from a Cryogenic Buffer Gas Beam Source via Excited State Chemistry", "author": [ { "family_name": "Jadbabaie", "given_name": "Arian", "orcid": "0000-0002-7606-5586", "clpid": "Jadbabaie-Arian" }, { "family_name": "Pilgram", "given_name": "Nickolas H.", "orcid": "0000-0002-5467-3783", "clpid": "Pilgram-Nickolas-H" }, { "family_name": "K\u0142os", "given_name": "Jacek", "clpid": "K\u0142os-Jacek" }, { "family_name": "Kotochigova", "given_name": "Svetlana", "clpid": "Kotochigova-Svetlana" }, { "family_name": "Hutzler", "given_name": "Nicholas R.", "orcid": "0000-0002-5203-3635", "clpid": "Hutzler-N-R" } ], "abstract": "We use narrow-band laser excitation of Yb to substantially enhance the brightness of a cold beam of YbOH, a polyatomic molecule with high sensitivity to physics beyond the Standard Model (BSM). By exciting atomic Yb to the metastable \u00b3P\u2081 state in a cryogenic environment, we significantly increase the chemical reaction cross-section for collisions of Yb with reactants. We characterize the dependence of the enhancement on the properties of the laser light, and study the final state distribution of the YbOH products. The resulting bright, cold YbOH beam can be used to increase the statistical sensitivity in searches for new physics utilizing YbOH, such as electron electric dipole moment (eEDM) and nuclear magnetic quadrupole moment (NMQM) experiments. We also perform new quantum chemical calculations that confirm the enhanced reactivity observed in our experiment. Additionally, our calculations compare reaction pathways of Yb(\u00b3P) with the reactants H\u2082O and H\u2082O\u2082. More generally, our work presents a broad approach for improving experiments that use cryogenic molecular beams for laser cooling and precision measurement searches of BSM physics.", "doi": "10.48550/arXiv.1910.11331", "publisher": "arXiv", "publication_date": "2019-10-24" }, { "id": "authors:k4r30-g2y67", "collection": "authors", "collection_id": "k4r30-g2y67", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170830-103658699", "type": "monograph", "title": "Motional Ground State Cooling Outside the Lamb-Dicke Regime", "author": [ { "family_name": "Yu", "given_name": "Yichao", "clpid": "Yu-Yichao" }, { "family_name": "Hutzler", "given_name": "Nicholas R.", "orcid": "0000-0002-5203-3635", "clpid": "Hutzler-N-R" }, { "family_name": "Zhang", "given_name": "Jessie T.", "clpid": "Zhang-Jessie-T" }, { "family_name": "Liu", "given_name": "Lee R.", "clpid": "Liu-Lee-R" }, { "family_name": "Rosenband", "given_name": "Till", "clpid": "Rosenband-T" }, { "family_name": "Ni", "given_name": "Kang-Kuen", "clpid": "Ni-Kang-Kuen" } ], "abstract": "We report Raman sideband cooling of a single sodium atom to its three-dimensional motional ground state in an optical tweezer. Despite a large Lamb-Dicke parameter, high initial temperature, and large differential light shifts between the excited state and the ground state, we achieve a ground state population of 81(4)% after 100 ms of cooling, for the 85% of atoms that survive cooling and re-imaging. Our technique includes addressing high-order sidebands, where several motional quanta are removed by a single laser pulse, and fast modulation of the optical tweezer intensity. We demonstrate that Raman sideband cooling to the 3D motional ground state is possible, even without tight confinement and low initial temperature.", "doi": "10.48550/arXiv.1708.03296", "publication_date": "2017-08-10" }, { "id": "authors:8btz4-7hg56", "collection": "authors", "collection_id": "8btz4-7hg56", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170830-133556575", "type": "monograph", "title": "Ultracold Molecular Assembly", "author": [ { "family_name": "Liu", "given_name": "Lee R.", "clpid": "Liu-Lee-R" }, { "family_name": "Zhang", "given_name": "Jessie T.", "clpid": "Zhang-Jessie-T" }, { "family_name": "Yu", "given_name": "Yichao", "clpid": "Yu-Yichao" }, { "family_name": "Hutzler", "given_name": "Nicholas R.", "orcid": "0000-0002-5203-3635", "clpid": "Hutzler-N-R" }, { "family_name": "Yu", "given_name": "Liu", "clpid": "Yu-Liu" }, { "family_name": "Rosenband", "given_name": "Till", "clpid": "Rosenband-T" }, { "family_name": "Ni", "given_name": "Kang-Kuen", "clpid": "Ni-Kang-Kuen" } ], "abstract": "Chemical reactions can be surprisingly efficient at ultracold temperatures ( < 1mK) due to the wave nature of atoms and molecules. The study of reactions in the ultracold regime is a new research frontier enabled by cooling and trapping techniques developed in atomic and molecular physics. In addition, ultracold molecular gases that offer diverse molecular internal states and large electric dipolar interactions are sought after for studies of strongly interacting many-body quantum physics. Here we propose a new approach for producing ultracold molecules in the absolute internal and motional quantum ground state, where single molecules are assembled one by one from individual atoms. The scheme involves laser cooling, optical trapping, Raman sideband cooling, and coherent molecular state transfer. As a crucial initial step, we demonstrate quantum control of constituent atoms, including 3D ground-state cooling of a single Cs atom, in a simple apparatus. As laser technology advances to shorter wavelengths, additional atoms will be amenable to laser-cooling, allowing more diverse, and eventually more complex, molecules to be assembled with full quantum control.", "doi": "10.48550/arXiv.1701.03121", "publication_date": "2017-01-11" } ]