Past Events

Large ensembles of laser-cooled atoms interacting via photon-mediated interactions are powerful platforms for quantum simulation and sensing. In this work, I will present a cavity-QED system with matter waves coupled to a high-finesse cavity. In this system, we successfully generated entanglement between atomic momentum states and realized the first entangled matter-wave interferometer.

Abstract: Reactions of the hydroxyl radical (OH) in the gas phase and at the gas-liquid interface initiate and propagate complex chemical schemes in combustion, planetary atmospheres, and the interstellar medium. In aqueous aerosols, the confinement of the reactants near the air-water interface leads to complex behavior of the particle reactive uptake with particle composition. In the gas phase, the branching ratio between the abstraction and addition mechanisms is highly dependent on the reactant’s structure and the gas temperature.

Abstract: Circuit quantization is an extraordinarily successful theory that describes the behavior of quantum circuits with high precision.

Absract: The Earth’s stratosphere, which sits above the troposphere, is a difficult place to make measurements. The highest-flying aircraft can only reach the lowermost portion of the stratosphere, while space-based sensors orbiting well above are limited by technique. Balloons can profile in situ from the surface up to approximately 35 km. Thus, they are a critical measurement platform for investigating the stratospheric constituents and processes that play important roles in regulating Earth’s climate.

Abstract: Quantum materials promise new states of matter and platforms for next-generation electronics, but in many cases no tractable theoretical models exist for their behavior. Compounding this difficulty is the fact that their key properties—quantum entanglement—have been historically very difficult to probe. In this talk I discuss recent work to use neutron spectroscopy to probe many-body entanglement between electron spins in real solid state materials.

Abstract: The creation of a matter-wave interferometer can be achieved by loading Bose-Einstein condensed atoms into a crystal of light formed by interfering laser beams. By translating this optical lattice in a specific way, the traditional steps of interferometry can all be implemented, i.e., splitting, propagating, reflecting, and recombining the quantum wavefunction. Using this concept, we have designed and built a compact device to sense inertial signals, including accelerations, rotations, gravity, and gravity gradients.

Learn about how to navigate and negotiate your career after your postdoc by attending this panel featuring 3 JILA Fellows. 

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Abstract: Imagine if the act of looking at an object caused it to move – or imagine you had a pair of dice that always rolled doubles, but of different numbers each roll. These counterintuitive phenomena are commonplace in the realm of quantum mechanics, which describes systems that are generally very small, very cold, and/or very isolated from the rest of the world.

Speaker bio: Ben Brubaker is a New York City-based science journalist who covers theoretical computer science as a staff writer for Quanta Magazine. His writing has also appeared in Scientific American, and Physics Today, and elsewhere. He received a Ph.D. in physics from Yale University and conducted postdoctoral research at JILA before moving into science writing.
 

Reception at 5:30 at the Sink. We'll meet at the hbar at 5:15 to head over.

Abstract: Tremendous new insights into the Martian atmosphere have been achieved in recent years by two ultraviolet spectrographs built at LASP: the Imaging Ultraviolet Spectrograph (IUVS) aboard the Mars Atmospheric and Volatile EvolutioN (MAVEN) mission, and the Emirates Mars Ultraviolet Spectrometer (EMUS) aboard the Emirates Mars Mission (EMM). Both instruments have far exceeded their design goals in science return.

 Ultracold dipolar atoms and molecules present a wealth of exciting out-of-equilibrium phenomena. I’ll discuss some of the understanding developed over the past several years, and several useful applications to experiments.

Abstract: Living systems exhibit unique emergent properties such as self-assembly, rigidity, resilience, and robustness.

Abstract: Polarons, quasiparticles composed of an electronic excitation and the material deformation these cause in a solid or liquid, are ubiquitous. Understanding and controlling their formation, nonequilibrium relaxation, and motion are essential in developing next-generation photocatalysts, energy conversion devices, and even superconductors. In this talk, I introduce some of our recent theoretical advances that enable us to probe the exact quantum dynamics of Holstein polarons subject to dispersive phonon baths in small lattice models to the thermodynamic limit.