A5070801195- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Spectroscopy and Laser Applications
- Quantum optics and atomic interactions
- Advanced Frequency and Time Standards
- Quantum Information and Cryptography
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Advanced Fiber Laser Technologies
- Quantum Mechanics and Applications
- Molecular Spectroscopy and Structure
- Laser-Matter Interactions and Applications
- Optical properties and cooling technologies in crystalline materials
- Spectroscopy and Quantum Chemical Studies
- Radiation Detection and Scintillator Technologies
- Mechanical and Optical Resonators
- Experimental and Theoretical Physics Studies
- Infection Control and Ventilation
- Phase Equilibria and Thermodynamics
- Laser Design and Applications
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
MIT-Harvard Center for Ultracold Atoms
2016-2025
Harvard University Press
2014-2025
National Energy Technology Laboratory
2025
Harvard University
2015-2024
Okayama University of Science
2021-2022
Arizona State University
2015-2021
Johns Hopkins University
2010-2021
Ansys (United States)
2019
Enterprise Ireland
2018
National Institute of Standards
2016
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 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,...
Ultracold molecules have important applications that range from quantum simulation and computation to precision measurements probing physics beyond the Standard Model. Optical tweezer arrays of laser-cooled molecules, which allow control individual particles, offer a platform for realizing this full potential. In work, we report on creating an optical array calcium monofluoride molecules. This has also allowed us observe ground-state collisions both in presence absence near-resonant light.
We perform magnetically assisted Sisyphus laser cooling of the triatomic free radical strontium monohydroxide (SrOH). This is achieved with principal optical cycling in rotationally closed P(N′′=1) branch either X˜2Σ+(000)↔A˜2Π1/2(000) or X˜2Σ+(000)↔B˜2Σ+(000) vibronic transitions. Molecules lost into excited vibrational states during process are repumped back through B˜(000) state for both (100) level Sr-O stretching mode and (0200) bending mode. The transverse temperature a SrOH molecular...
Combined integration of TEER and MEA sensors in a single endothelialized Organ-on-Chip platform.
We demonstrate significantly improved magneto-optical trapping of molecules using a very slow cryogenic beam source and RF modulated DC magnetic fields. The MOT confines $1.1(3) \times 10^5$ CaF at density $4(1) 10^6$ cm$^{-3}$, which is an order magnitude greater than previous molecular MOTs. Near Doppler-limited temperatures $340(20)$ $\mu$K are attained. achieved enables future work to directly load optical tweezers create arrays for quantum simulation.
We report three-dimensional trapping of an oxide molecule (YO), using a radio-frequency magneto-optical trap (MOT). The total number molecules loaded is $\sim$1.5$\times10^4$ , with temperature 7(1)~mK. This diversifies the frontier that are laser coolable and paves way for second-stage narrow-line cooling in this to microkelvin regime. Futhermore, new challenges creating 3-D MOT YO resolved here indicate MOTs more complex non-linear should be feasible as well.
We report direct laser cooling of a symmetric top molecule, reducing the transverse temperature beam calcium monomethoxide (CaOCH$_3$) to $1.8\pm0.7$ mK while addressing two distinct nuclear spin isomers. These results open path efficient production ultracold chiral molecules and conclusively demonstrate that by using proper rovibronic optical transitions, both photon cycling complex can be as for much simpler linear species.
Abstract Doppler and Sisyphus cooling of 174 YbOH are achieved studied. This polyatomic molecule has high sensitivity to physics beyond the Standard Model represents a new class species for future high-precision probes T-violating physics. The transverse temperature beam is reduced by nearly two orders magnitude < 600 μ K phase-space density increased factor > 6 via cooling. We develop full numerical model laser find excellent agreement with data. project that magneto-optical trapping...
Harnessing the potential wide-ranging quantum science applications of molecules will require control their interactions. Here, we use microwave radiation to directly engineer and tune interaction potentials between ultracold calcium monofluoride (CaF) molecules. By merging two optical tweezers, each containing a single molecule, probe collisions in three dimensions. The correct combination frequency power creates an effective repulsive shield, which suppresses inelastic loss rate by factor...
Ultracold polar molecules are promising candidate qubits for quantum computing and simulations. Their long-lived molecular rotational states form robust qubits, the long-range dipolar interaction between provides entanglement. In this work, we demonstrate spin-exchange interactions single calcium monofluoride (CaF) trapped in an optical tweezer array. We realized spin- <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mfrac> <mml:mn>1</mml:mn>...
We describe a method for loading paramagnetic atoms or molecules into magnetic trap. A $^{3}\mathrm{He}$ buffer gas is employed to thermalize temperature of approximately 240 mK, lower than the depth model described that indicates an initial density ${10}^{13}$ ${\mathrm{cm}}^{\ensuremath{-}3}$. Once has taken place removed by cryopumping. Evaporative cooling can then be applied further and increase trapped sample.
A gas of hydrogen atoms, confined in a static magnetic trap, has been evaporatively cooled to temperatures few millikelvin. The initial trap configuration held the at 38 mK for as long 5 h. Evaporative cooling reduced temperature 3.0 while maintaining central density 7.6\ifmmode\times\else\texttimes\fi{}${10}^{12}$ ${\mathrm{cm}}^{\ensuremath{-}3}$. These values were determined by measurement rate electronic spin relaxation and are agreement with model calculations. Further 1 (inferred from...
We have confined over 5\ifmmode\times\else\texttimes\fi{}${10}^{12}$ atoms of hydrogen in a static magnetic trap. The are loaded into the trap by precooling with dilution refrigerator. At operating densities near 1\ifmmode\times\else\texttimes\fi{}${10}^{13}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$ gas is observed to be electron and nuclear polarized uppermost hyperfine state. long lifetime trapped (over 20 min) suggests that it thermally decoupled from wall has evaporatively cooled...
We have measured the sticking probability of atomic hydrogen on a superfluid $^{4}\mathrm{He}$ surface for atom energies between 100 \ensuremath{\mu}K and 1 mK. The shows little variation with energy over this interval, is close to value 0.2. studies were carried out using magnetic trap that produced density 8\ifmmode\times\else\texttimes\fi{}${10}^{13}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$ at temperature \ensuremath{\mu}K.
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.
The goal of the present article is to review major developments that have led current understanding molecule-field interactions and experimental methods for manipulating molecules with electromagnetic fields. Molecule-field are at core several, seemingly distinct, areas molecular physics. This reflected in organization this article, which includes sections on Field control beams, External field traps cold molecules, Control orientation alignment, Manipulation by non-conservative forces,...
We demonstrate chirality-induced three-wave mixing in the microwave regime, using rotational transitions cold gas-phase samples of 1,2-propanediol and 1,3-butanediol. show that bulk mixing, which can only be realized a chiral environment, provides sensitive, species-selective probe enantiomeric excess is applicable to broad class molecules. The doubly resonant condition simultaneous identification species handedness, should allow sensitive analysis even within complex mixture.