A5027003713- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Advanced Frequency and Time Standards
- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Advanced Chemical Physics Studies
- Electron and X-Ray Spectroscopy Techniques
- Radioactive Decay and Measurement Techniques
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Quantum Mechanics and Applications
- Spectroscopy and Laser Applications
- History and advancements in chemistry
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Advanced NMR Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Various Chemistry Research Topics
- Radiation Detection and Scintillator Technologies
- Quantum and electron transport phenomena
- Laser Design and Applications
- Molecular Junctions and Nanostructures
- Scientific Measurement and Uncertainty Evaluation
University of Chicago
2021-2024
Argonne National Laboratory
1987-2024
Yale University
2011-2020
Joint Quantum Institute
2018
National Institute of Standards and Technology
2018
University of Delaware
2018
University of Maryland, College Park
2018
Harvard University
2016
Blackstone (United States)
2016
Arizona State University
2011-2014
We propose a novel physical realization of quantum computer. The qubits are electric dipole moments ultracold diatomic molecules, oriented along or against an external field. Individual molecules held in 1D trap array, with field gradient allowing spectroscopic addressing each site. Bits coupled via the dipole-dipole interaction. Using technologies similar to those already demonstrated, this design can plausibly lead computer greater, approximately > = 10(4) qubits, which perform 10(5) CNOT...
This article presents a review of the current state art in research field cold and ultracold molecules. It serves as an introduction to Special Issue New Journal Physics on Cold Ultracold Molecules describes new prospects for fundamental technological development. molecules may revolutionize physical chemistry few body physics, provide techniques probing states quantum matter, allow precision measurements both applied interest, enable simulations condensed-matter phenomena. offer promising...
Advances in atomic physics, such as cooling and trapping of atoms molecules developments frequency metrology, have added orders magnitude to the precision atom-based clocks sensors. Applications extend beyond physics this article reviews using these new techniques address important challenges look for variations fundamental constants, search interactions standard model particle test principles general relativity.
Stubbornly Spherical The shape of the electron's charge distribution reflects degree to which switching direction time impacts basic ingredients universe. Standard Model (SM) particle physics predicts a very slight asphericity distribution, whereas SM extensions such as supersymmetry posit bigger and potentially measurable, but still tiny, deviations from perfect sphere. Polar molecules have been identified ideal settings for measuring this asymmetry, should be reflected in finite electric...
We present the result of our most recent search for $T$ violation in ${}^{205}\mathrm{Tl}$, which is interpreted terms an electric dipole moment electron ${d}_{e}$. find ${d}_{e}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}(6.9\ifmmode\pm\else\textpm\fi{}7.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}28}e\mathrm{cm}$, yields upper limit $|{d}_{e}|\ensuremath{\le}1.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}27}e\mathrm{cm}$ with $90%$ confidence. The apparatus a...
We demonstrate the production of ultracold polar RbCs molecules in their vibronic ground state, via photoassociation laser-cooled atoms followed by a laser-stimulated state transfer process. The resulting sample X1Sigma+ (nu = 0) has translational temperature approximately 100 microK and narrow distribution rotational states. With method described here it should be possible to produce samples even colder all degrees freedom, as well other bialkali species.
We investigate a hybrid quantum circuit where ensembles of cold polar molecules serve as long-lived memories and optical interfaces for solid state processors. The memory realized by collective spin states (ensemble qubit) is coupled to high-Q stripline cavity via microwave Raman processes. show that convenient trap-surface distances few $\mu$m, strong coupling between the ensemble qubit can be achieved. discuss basic information protocols, including swap from photon bus molecular memory,...
This chapter of the report "Flavor in era LHC" Workshop discusses theoretical, phenomenological and experimental issues related to flavor phenomena charged lepton sector conserving CP-violating processes. We review current limits main theoretical models for structure fundamental particles. analyze consequences available data, setting constraints on explicit beyond standard model, presenting benchmarks discovery potential forthcoming measurements both at LHC low energy, exploring options...
Abstract Molecules containing short-lived, radioactive nuclei are uniquely positioned to enable a wide range of scientific discoveries in the areas fundamental symmetries, astrophysics, nuclear structure, and chemistry. Recent advances ability create, cool, control complex molecules down quantum level, along with recent upcoming species production at several facilities around world, create compelling opportunity coordinate combine these efforts bring precision measurement extreme nuclei. In...
New results are reported in our search for the electric dipole moment ${\mathit{d}}_{\mathit{e}}$ of electron ground 6 $^{2}$${\mathit{P}}_{1/2}$ state $^{205}\mathrm{Tl}$. The atomic-beam magnetic resonance method is employed with separated oscillating fields. A field B defines axis quantization, and an E, parallel to B, applied region between Laser optical pumping used selection analysis, signal fluorescence accompanying decay excited atoms analyzer region. signature a nonzero dependence...
We have produced ultracold, polar RbCs* molecules via photoassociation in a laser-cooled mixture of Rb and Cs atoms. Using model the molecular interaction which reproduces observed rovibrational structure, we infer decay rates our experiments into deeply bound X(1)Sigma(+) ground-state RbCs vibrational levels as high 5 x 10(5) s(-1) per level. Population such could be efficiently transferred to ground state using single stimulated Raman transition, opening possibility create large samples...
We demonstrate a scheme for optical cycling in the polar, diatomic molecule strontium monofluoride (SrF) using ${X}^{2}{\ensuremath{\Sigma}}^{+}\ensuremath{\rightarrow}{A}^{2}{\ensuremath{\Pi}}_{1/2}$ electronic transition. SrF's highly diagonal Franck-Condon factors suppress vibrational branching. eliminate rotational branching by employing quasicycling $N=1\ensuremath{\rightarrow}{N}^{\ensuremath{'}}=0$ type transition conjunction with magnetic field remixing of dark Zeeman sublevels....
Using resonance-enhanced two-photon ionization, we detect ultracold, ground-state RbCs molecules formed via photoassociation in a laser-cooled mixture of 85Rb and 133Cs atoms. We obtain extensive bound-bound excitation spectra these molecules, which provide detailed information about their vibrational distribution, as well spectroscopic data on the ground a^3\Sigma^+ excited (2)^3\Sigma^+, (1)^1\Pi states. Analysis this allows us to predict strong transitions from observed levels absolute...
Nuclear spin-dependent parity violation arises from weak interactions between electrons and nucleons nuclear anapole moments. We outline a method to measure such effects, using Stark-interference technique determine the mixing opposite-parity rotational/hyperfine levels of ground-state molecules. The is applicable nuclei over wide range atomic number, in diatomic species that are theoretically tractable for interpretation. This should provide data on moments many previously unmeasured...
We demonstrate and characterize a high-flux beam source for cold, slow atoms or molecules. The desired species is vaporized using laser ablation, then cooled by thermalization in cryogenic cell of buffer gas. formed particles exiting hole the gas cell. properties (flux, forward velocity, temperature) both an atom (Na) molecule (PbO) under varying density, discuss conditions optimizing these parameters. Our compares favorably to existing techniques formation, variety applications.
We propose new experiments with high sensitivity to a possible variation of the electron-to-proton mass ratio $\ensuremath{\mu}\ensuremath{\equiv}{m}_{e}/{m}_{p}$. consider nearly degenerate pair molecular vibrational levels, each associated different electronic potential. With respect change in $\ensuremath{\mu}$, splitting between such levels can be large both on an absolute scale and relative splitting. demonstrate existence pairs states ${\mathrm{Cs}}_{2}$, where narrow spectral lines...
We describe a novel approach to directly measure the energy of narrow, low-lying isomeric state in 229Th. Since nuclear transitions are far less sensitive environmental conditions than atomic transitions, we argue that 229Th optical transition may be driven inside host crystal with high Q. This technique might also allow for construction solid-state frequency reference surpasses short-term stability current clocks, as well improved limits on variability fundamental constants. Based analysis...
We demonstrate a scheme for magneto-optically trapping strontium monofluoride (SrF) molecules at temperatures one order of magnitude lower and phase space densities 3 orders higher than obtained previously with laser-cooled molecules. In our trap, optical dark states are destabilized by rapidly synchronously reversing the laser polarizations applied magnetic field gradient. The number trap lifetime also significantly improved from previous work loading high power then reducing long-term...
We demonstrate deceleration of a beam neutral strontium monofluoride molecules using radiative forces. Under certain conditions, the results in substantial flux detected with velocities ≲50 m/s. Simulations and other data indicate that detection below this velocity is greatly diminished by transverse divergence from beam. The observed slowing, ∼140 m/s, corresponds to scattering ≳10(4) photons. also observe longitudinal compression under different conditions. Combined molecular laser cooling...
We demonstrate the efficient transfer of molecules from a magneto-optical trap into conservative magnetic quadrupole trap. Our scheme begins with blue-detuned optical molasses to cool SrF $\ensuremath{\approx}50\text{ }\text{ }\ensuremath{\mu}\mathrm{K}$. Next, we optically pump strongly trapped sublevel. This two-step process reliably transfers $\ensuremath{\approx}40%$ initially in single quantum state Once loaded, molecule cloud is compressed by increasing field gradient. observe lifetime...