A5040991942- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Chemical Physics Studies
- Spectroscopy and Laser Applications
- Spectroscopy and Quantum Chemical Studies
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Quantum, superfluid, helium dynamics
- Laser-Matter Interactions and Applications
- Quantum Mechanics and Applications
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum Computing Algorithms and Architecture
- Luminescence Properties of Advanced Materials
Princeton University
2025
Leipzig University
2023
ETH Zurich
2019-2021
Highly excited Rydberg states and their interactions play an important role in quantum computing simulation. These properties can be predicted accurately for alkali atoms with simple level structures. However, extension of these methods to more complex such as alkaline-earth has not been demonstrated or experimentally validated. Here, we present multichannel defect models highly <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
Attosecond science in liquid phase Many physical properties of water remain unresolved due to the very fast dynamics involved phase. Using attosecond time-resolved photoelectron spectroscopy, Jordan et al. found that photoemission electrons from shows a time delay about 50 70 attoseconds compared with gas This difference was attributed solvation effects and validated by analysis various contributions measured delays using theoretical simulations clusters different sizes. Science , this issue p. 974
Mean free paths of low-energy electrons in liquid water are importance for modeling many physicochemical processes, but neither theoretical predictions nor experimental results have converged these parameters. We therefore introduce an approach to determine elastic and inelastic mean (EMFP, IMFP) based on data. show that ab initio calculations electron scattering with clusters converge cluster size, thus providing access condensed-phase scattering. The used Monte Carlo simulations extract...
We present absolute-frequency measurements in ultracold $^{39}\mathrm{K}$ samples of the transitions from $4{s}_{1/2}$ ground state to $n{p}_{1/2}$ and $n{p}_{3/2}$ Rydberg states. A global nonlinear regression term values yields an improved wave number 35009.8139710(22)${}_{\mathrm{sys}}{(3)}_{\mathrm{stat}}\phantom{\rule{4pt}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ for first ionization threshold quantum defects series. In addition, we report frequencies selected one-photon...
We present the formation of homonuclear ${\mathrm{Cs}}_{2}$, ${\mathrm{K}}_{2}$, and heteronuclear CsK long-range Rydberg molecules in a dual-species magneto-optical trap for $^{39}\mathrm{K}$ $^{133}\mathrm{Cs}$ by one-photon UV photoassociation. The different ground-state-density dependence homo- photoassociation rates detection stable molecular ions resulting from autoionization provide an unambiguous assignment. perform bound-bound millimeter-wave spectroscopy to access states not...
Rydberg states of atoms and molecules are very sensitive to electric fields. This property makes them ideal electric-field sensors but is detrimental applications in quantum optics, quantum-information processing, simulation because inhomogeneous Stark broadening the resulting loss coherence. We demonstrate, with example $^{39}\mathrm{K}$, existence Rydberg-Rydberg transitions extremely small differential dc shifts, which we call dc-field-magic transitions. These hardly exhibit any...
We present a new mechanism contributing to the detection of photoassociated long-range Rydberg molecules via pulsed-field ionization: ionic products, created by decay molecule, modify excitation spectrum surrounding ground-state atoms and facilitate further into states photoassociation light. Such an ion-mediated has been previously called "Coulomb anti-blockade". Pulsed-field ionisation typically doesn't discriminate between ionization molecule isolated atom, thus number atomic ions...
Abstract We propose a new approach to excite ion-pair states of ultracold dimers. The central idea is two-step process where first long-range Rydberg molecules are formed by photoassociation, which then driven stimulated emission towards the state, bearing features photo-induced harpooning reaction. assess feasibility this through detailed experimental and theoretical study on specific system, p -wave-scattering dominated in caesium, discuss potential applications for strongly correlated...
We present photodissociation of ultracold long-range Rydberg molecules as a tool to characterize their electronic properties. photoassociate $^{39}\mathrm{K}_{2} 37\phantom{\rule{0.16em}{0ex}}^{2}P$ with highly entangled and nuclear spins the two bound atoms quantify entanglement by projection molecular state onto noninteracting using radio-frequency photodissociation. By comparison experimental rates theoretical predictions, we further wave function photoassociated molecules. Based on...
We present multichannel quantum defect (MQDT) models for highly excited $^{174}$Yb and $^{171}$Yb Rydberg states with $L \leq 2$. The are developed using a combination of existing literature data new, high-precision laser microwave spectroscopy in an atomic beam, validated by detailed comparison experimentally measured Stark shifts magnetic moments. then use these to compute interaction potentials between two Yb atoms, find excellent agreement direct measurements optical tweezer array. From...