JILA Auditorium
Galaxies in extreme environments
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Abstract: Galaxies are a lot like people. If you pay attention to someone’s accent, mannerism, music taste, and cuisine preference — you can infer something about their culture, their heritage, their ancestry. On the same vein, by inspecting a galaxy’s morphology, kinematics and chemical composition — one can infer information about its assembly history, its interaction history. The first part of this talk will focus on extreme galactic collisions, where a small satellite crashes onto the baryonic body of a massive neighbor and survives.
Hot exciton cooling in nanocrystals quantum dots: Why exciton under confinement relax rapidly?
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Abstract: The efficiencies of devices utilizing semiconductor nanocrystals (NCs) are predominantly regulated by nonradiative processes. One key process in this regard is hot exciton cooling, wherein a highly excited electron-hole pair undergoes nonradiative relaxation to give rise to a band-edge exciton. The timescale and mechanism of this cooling process are not comprehensively understood.
Data-informed discovery of earth-abundant semiconductors for solar hydrogen generation
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Abstract: Solar hydrogen generation is pivotal to diversifying the global energy supply away from fossil fuels in the transportation sector and across major industries, including ammonia synthesis, process metallurgy, and hydrocarbon production [1,2].
Frequency combs as the route to the spectroscopic trifecta: high time resolution, high frequency resolution, and high sensitivity
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Abstract: Many consequential chemical processes take place on ultrafast timescales, including molecular vibrations and bond breaking. Measurements that follow ultrafast molecular dynamics in real time are changing our understanding of these processes. We are designing new tools to study ultrafast molecular dynamics and quantum mechanics with the sensitivity enough to study the molecules in molecular beams and the spectral resolution sufficient for vibrational and rotational resolution.
Molecular Quantum Information Science with Electron Spins
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Abstract: Quantum technologies based on molecules afford unique potential in miniaturization, spatial localization, and tunability through synthetic chemistry. Paramagnetic molecules constitute a platform for implementing quantum bits (qubits) and quantum sensors (qusors). While electron spin decoherence can potentially be leveraged in quantum sensing applications, its use is ultimately limited by spin relaxation, which effectively leaks quantum information into the environment.
Exciting 1D gases
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Abstract: 1D gases with point contact interactions are special because they are integrable many-body systems, which means that they have many extra conserved quantities, beyond the usual few (energy, momentum, etc.). I will explain how we make bundles of 1D Bose gases in the lab, the various ways we excite them out of equilibrium, and how we use them as model systems for studying quantum dynamics.