A5037223356- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Quantum optics and atomic interactions
- Quantum, superfluid, helium dynamics
- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Spectroscopy and Laser Applications
- Experimental and Theoretical Physics Studies
- Advanced Fiber Laser Technologies
- Planetary Science and Exploration
- Strong Light-Matter Interactions
- Semiconductor Lasers and Optical Devices
- Solid State Laser Technologies
- Dark Matter and Cosmic Phenomena
- Advanced Materials Characterization Techniques
- Mechanical and Optical Resonators
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- Scientific Research and Discoveries
- Minerals Flotation and Separation Techniques
- Quantum Chromodynamics and Particle Interactions
- Solar and Space Plasma Dynamics
- Quantum Electrodynamics and Casimir Effect
- Advanced MRI Techniques and Applications
Bates College
2009-2024
Carnegie Hall
2023
National Institute of Standards and Technology
2008-2019
Joint Quantum Institute
2009-2019
University of Maryland, College Park
2019
Jet Propulsion Laboratory
2003-2008
California Institute of Technology
2006
Abstract Progress in understanding quantum systems has been driven by the exploration of geometry, topology, and dimensionality ultracold atomic systems. The NASA Cold Atom Laboratory (CAL) aboard International Space Station enabled study bubbles, a terrestrially-inaccessible topology. Proof-of-principle bubble experiments have performed on CAL with an radiofrequency-dressing technique; alternate technique (dual-species interaction-driven bubbles) also proposed. Both techniques can drive...
Extending the understanding of Bose-Einstein condensate (BEC) physics to new geometries and topologies has a long varied history in ultracold atomic physics. One such geometry is that bubble, where would be confined surface an ellipsoidal shell. Study this give insight into collective modes, self-interference effects, topology-dependent vortex behavior, dimensionality crossovers from thick thin shells, properties condensates pushed ultradilute limit. Here we propose implement realistic...
Microgravity eases several constraints limiting experiments with ultracold and condensed atoms on ground. It enables extended times of flight without suspension eliminates the gravitational sag for trapped atoms. These advantages motivated numerous initiatives to adapt operate experimental setups microgravity platforms. We describe design payload, motivations choices, capabilities Bose-Einstein Condensate Cold Atom Laboratory (BECCAL), a NASA-DLR collaboration. BECCAL builds heritage...
We report on the generation of over 900 mW tunable cw light at 780 nm by single pass frequency doubling a high power fiber amplifier in cascade two periodically poled Lithium Niobate (PPLN) crystals. Over 500 is generated first crystal. In limit low pump power, we observe an efficiency 4.6 mW/W2-cm for crystal, and 5.6 combination crystals, with enhancement observed crystals due to presence second harmonic from crystal acting as seed second. have locked this laser source relative rubidium D2...
We demonstrate the cancellation of differential ac Stark shift microwave hyperfine clock transition in trapped $^{87}\mathrm{Rb}$ atoms. Recent progress metrology exploits so-called magic wavelengths, whereby an atomic ensemble can be with laser light whose wavelength is chosen so that both levels optical experience identical shifts. Similar magic-wavelength techniques are not possible for transitions alkali metals due to their simple electronic structure. show, however, indeed achievable...
Inspired by investigations of Bose-Einstein condensates (BECs) produced in the Cold Atom Laboratory (CAL) aboard International Space Station, we present a study thermodynamic properties shell-shaped BECs. Within context spherically symmetric ``bubble trap'' potential, evolution system from small filled spheres to hollow, large, thin shells via tuning trap parameters. We analyze bubble spectrum and states track distinct changes spectra between radial angular modes across evolution. This...
We demonstrate near-complete cancellation of the differential light shift a two-photon magnetic-field-insensitive microwave hyperfine (clock) transition in $^{87}$Rb atoms trapped an optical lattice. Up to $95(2)%$ is canceled while maintaining magnetic-field insensitivity. This technique should have applications quantum information and frequency metrology.
Decoherence of quantum systems due to uncontrolled fluctuations the environment presents fundamental obstacles in science. Clock transitions which are insensitive such used improve coherence, however, they not present all or for arbitrary system parameters. Here we create a trio synthetic clock using continuous dynamical decoupling spin-1 Bose-Einstein condensate observe reduction sensitivity magnetic-field noise up four orders magnitude; this work complements parallel by Anderson et al.. In...
We load cold atoms into an optical lattice dramatically reshaped by radio-frequency coupling of state-dependent potentials. This dressing changes the unit cell at a subwavelength scale, such that its curvature and topology departs strongly from simple sinusoidal potential. Radio-frequency has previously been performed length scales mm to tens mum, but not single-optical-wavelength scale. At this scale significant between adiabatic potentials leads nonadiabatic transitions, which we measure...
Abstract Microgravity platforms enable cold atom research beyond experiments in typical laboratories by removing restrictions due to the gravitational acceleration or compensation techniques. While space allows for undisturbed experimentation, technological readiness, availability and accessibility present challenges experimental operation. In this work we focus on main capabilities unique features of ground-based microgravity facilities research. A selection current future scientific...
We load a Bose-Einstein condensate into one-dimensional (1D) optical lattice altered through the use of radio-frequency (rf) dressing. The rf resonantly couples three levels $^{87}\mathrm{Rb}$ $F=1$ manifold and combines with spin-dependent ``bare'' to result in adiabatic potentials variable shape, depth, spatial frequency content. choose dressing parameters such that is stable over lifetimes exceeding tens ms at higher depths than previous work. observe significant differences between BEC...
Abstract We briefly describe a ‘third generation’ follow-on to the Cold Atom Lab mission, currently operating aboard ISS and Bose–Einstein Condensate which is expected launch in 2026. This mission would feature modular design that allow critical hardware be optimized for specific investigations while allowing easy exchange with other enable multi-user facility.
Existing space-based cold atom experiments have demonstrated the utility of microgravity for improvements in observation times and minimizing expansion energy rate a freely evolving coherent matter wave. In this paper we explore potential to extend limits ultracold atoms utilizing not just microgravity, but also other aspects space environment such as exceptionally good vacuums extremely temperatures. The tantalizing possibility that may one day be able probe physics quantum objects with...
We demonstrate partial-transfer absorption imaging as a technique for repeatedly an ultracold atomic ensemble with minimal perturbation. prepare cloud in state that is dark to the light. then use microwave pulse coherently transfer small fraction of bright state, which we image using situ imaging. The amplitude or duration controls fractional from state. For fractions, can up 50 times before it depleted. As sample application, oscillating dipole trap measure frequency.
We generate a bright atomic beam containing laser-cooled rubidium and cesium, we use this to load mixed-species ultrahigh-vacuum (UHV) magneto-optical trap. have characterized our two-species over range of operating conditions, obtain similar atom fluxes for each species. Within the UHV trap, interspecies inelastic collisions are observed in form enhanced decay rates given species presence second trapped analyze trap decays loss rate due heteronuclear cold collisions, compare result...
We demonstrate a novel dual-beam atom laser formed by outcoupling oppositely polarized components of an all-optical F = 1 spinor Bose-Einstein condensate whose Zeeman sublevel populations have been coherently evolved through spin dynamics. The is means using single-beam running-wave dipole trap. create in the magnetic field-insensitive m(F) 0 state, and drive coherent spin-mixing evolution adiabatic compression initially weak Such dual beams, number-correlated angular momentum-conserving...