A5041550028- Quantum Chromodynamics and Particle Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Laser-Matter Interactions and Applications
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Quantum, superfluid, helium dynamics
- Atomic and Molecular Physics
- Spectroscopy and Laser Applications
- Mechanical and Optical Resonators
- Advanced Chemical Physics Studies
- Electron and X-Ray Spectroscopy Techniques
- Advanced Materials Characterization Techniques
- Molecular Spectroscopy and Structure
- Atmospheric Ozone and Climate
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Organic Chemistry Cycloaddition Reactions
- Diamond and Carbon-based Materials Research
- Molecular spectroscopy and chirality
- Advanced NMR Techniques and Applications
- Quantum chaos and dynamical systems
- Quantum Computing Algorithms and Architecture
- Quantum many-body systems
California Institute of Technology
2021-2024
Harvard University
2018-2019
MIT-Harvard Center for Ultracold Atoms
2018-2019
Kyoto University
2018
Abstract We propose a new scalable platform for quantum computing (QC)—an array of optically trapped symmetric-top molecules (STMs) the alkaline earth monomethoxide (MOCH 3 ) family. Individual STMs form qubits, and system is readily to 100–1000 qubits. STM qubits have desirable features QC compared atoms diatomic molecules. The additional rotational degree freedom about axis gives rise closely spaced opposite parity K -doublets that allow full alignment at low electric fields, hyperfine...
Precision measurements of Schiff moments in heavy, deformed nuclei are sensitive probes beyond Standard Model $T,P$-violation the hadronic sector. While most limits on to date set with diamagnetic atoms, polar polyatomic molecules can offer higher sensitivities unique experimental advantages. In particular, symmetric top molecular ions possess $K$-doublets opposite parity especially small splittings, leading full polarization at low fields, internal co-magnetometer states useful for...
Alkaline earth monoalkoxide free radicals (MORs) have molecular properties conducive to direct laser cooling sub-millikelvin temperatures. Using dispersed induced fluorescence (DLIF) measurements from a pulsed supersonic beam source we determine vibrational branching ratios and Franck-Condon factors for the MORs CaOH CaOCH$_{3}$. With narrow linewidth continuous-wave dye excitation, precisely measure both $\tilde{X}-\tilde{A}$ $\tilde{X}-\tilde{B}$ electronic systems in each molecule. Weak...
We demonstrate the effect of coherent optical bichromatic force on a molecule, polar free radical strontium monohydroxide (SrOH). A dual-frequency retroreflected laser beam addressing X˜2Σ+↔A˜2Π1/2 electronic transition coherently imparts momentum onto cryogenic SrOH. This directional photon exchange creates that transversely deflects molecules. By adjusting relative phase between forward and counterpropagating beams we reverse direction applied force. transfer 70ℏk is achieved with minimal...
We propose a method to measure time-reversal symmetry violation in molecules that overcomes the standard quantum limit while leveraging decoherence-free subspaces mitigate sensitivity classical noise. The protocol does not require an external electric field, and entangled states have no first-order static electromagnetic fields as they involve superpositions with zero average lab-frame projection of spins dipoles. This can be applied trapped neutral or ionic species, implemented using...
A doubly-quantum-degenerate Bose-Bose mixture of ${}^{174}$Yb-${}^{7}$Li and a Fermi-Bose ${}^{173}$Yb-${}^{7}$Li are experimentally realized in mixed spatial dimensions. The formation characterization the make step towards possible realization topological superfluid.
We have developed and demonstrated a scheme to achieve rotationally closed photon cycling in polyatomic molecules with complex hyperfine structure sensitivity hadronic symmetry violation, specifically, $^{171}\mathrm{YbOH}$ $^{173}\mathrm{YbOH}$. calculate branching ratios for spontaneous decay into the different levels identify repumping schemes. demonstrate our by photons molecular beam verify that we achieved measuring optical pumping unaddressed vibrational states. Our work makes...
Optical control of polyatomic molecules promises new opportunities in precision metrology and fundamental chemistry, as well quantum information many-body science. Contemporary experimental theoretical efforts have mostly focused on cycling photons via excitation a single electron localized to an alkaline earth (group 2)-like metal center. In this paper, we consider pathways towards optical with multi-electron degrees freedom, which arise from two or more electrons p-block post-transition...
Closed-shell atoms and molecules such as Hg TlF provide some of the best low-energy tests hadronic $\mathcal{CP}$ violation beyond standard model particle physics, which is considered to be a necessary ingredient explain observed excess matter over antimatter in our universe. expected strongly enhanced octupole-deformed nuclei $^{225}\mathrm{Ra}$. Recently, closed-shell radium-containing symmetric-top molecular ions were cooled sympathetically Coulomb crystal [Fan et al., Phys. Rev. Lett....
A relativistic coupled-cluster study of the low-lying electronic states in radium monohydroxide molecule (RaOH), a radioactive polyatomic interest to laser cooling and search new physics beyond Standard Model, is reported. The level positions A2Π1/2 C2Σ have been computed with an accuracy around 200 cm-1 facilitate spectroscopic observation RaOH using induced fluorescence spectroscopy, thereby exploiting systematic convergence electron-correlation basis-set effects calculations. energy for...
Relativistic exact two-component coupled-cluster calculations of molecular sensitivity factors for nuclear Schiff moments (NSMs) are reported. We focus on molecules containing heavy nuclei, especially octupole-deformed nuclei. Analytic relativistic gradient techniques used and serve as useful tools identifying candidate that sensitively probe physics beyond the Standard Model in hadronic sector. Notably, these enable straightforward ``black-box'' calculations. Two competing chemical...
Relativistic exact two-component coupled-cluster calculations of molecular sensitivity factors for nuclear Schiff moments (NSMs) are reported. We focus on molecules containing heavy nuclei, especially octupole-deformed nuclei. Analytic relativistic gradient techniques used and serve as useful tools identifying candidate that sensitively probe physics beyond the Standard Model in hadronic sector. Notably, these enable straightforward "black-box" calculations. Two competing chemical mechanisms...
Optical control of polyatomic molecules promises new opportunities in precision metrology, fundamental chemistry, quantum information, and many-body science. Contemporary experimental theoretical efforts have mostly focused on cycling photons via excitation a single electron localized to an alkaline earth (group 2)-like metal center. In this manuscript, we consider pathways towards optical with multi-electron degrees freedom, which arise from two or more electrons $p$-block post-transition...
We propose a method to measure time-reversal symmetry violation in molecules that overcomes the standard quantum limit while leveraging decoherence-free subspaces mitigate sensitivity classical noise. The protocol does not require an external electric field, and entangled states have no first-order static electromagnetic fields as they involve superpositions with zero average lab-frame projection of spins dipoles. This can be applied trapped neutral or ionic species, implemented using...
We have developed and demonstrated a scheme to achieve rotationally-closed photon cycling in polyatomic molecules with complex hyperfine structure sensitivity hadronic symmetry violation, specifically $^{171}$YbOH $^{173}$YbOH. calculate rotational branching ratios for spontaneous decay identify repumping schemes which use electro-optical modulators (EOMs) address the structure. demonstrate our by photons molecular beam verify that we achieved measuring optical pumping into unaddressed...
Closed-shell atoms and molecules such as Hg or TlF provide some of the best low-energy tests hadronic $\mathcal{CP}$-violation which is considered to be a necessary ingredient explain observed excess matter over antimatter in our universe. is, however, expected strongly enhanced octupole deformed nuclei $^{225}$Ra. Recently, closed-shell radium-containing symmetric-top molecular ions were cooled sympathetically Coulomb crystal [M. Fan et al., Phys. Rev. Lett. 126, 023002 (2021)] shown...