JILA Auditorium

Absract: The promising optoelectronic properties of halide perovskites position them as candidate materials for solar cells, displays, and more. Their compositional and process flexibility provides a large and attractive design space and has led to outstanding optoelectronic figures of merit. However, the same flexibility also gives rise to challenges in reproducibility and phase stability.

Abstract: The recent launch of JWST is revolutionizing our understanding of exoplanet atmospheres by providing observations at an unprecedented level of detail. In this talk, I will discuss two methods for studying the atmospheres of exoplanets with JWST. First, I will discuss the potential for spectroscopic eclipse mapping with JWST. Spectroscopic eclipse mapping is the only observational technique which allows for simultaneous resolution of the atmosphere in three spatial dimensions: latitude, longitude, and altitude.

Abstract: Rubble pile asteroids are thought to form in the aftermath of cataclysmic collisions between proto-planets. The details of how the detritus from such collisions reaccumulate to form these bodies are not well understood, yet can play a fundamental role in the subsequent evolution of these bodies in the solar system. Simple items such as how particle sizes and porosity is distributed within a body can have a significant influence on how they subsequently evolve.

Abstract: The solar corona is the hot and ionized outer atmosphere of the Sun.  It traces out the complex solar magnetic field and expands into interplanetary space as the supersonic solar wind.  In 1958, Eugene Parker theorized that the presence of a million-degree corona necessarily requires the outward acceleration of a wind.  However, despite many years of exploration of both phenomena, we still do not have a complete understanding of the processes that heat the coronal plasma to its bizarrely high temperatures.

Abstract: Over the last twenty years, physicists have learned to manipulate individual quantum objects: atoms, ions, molecules, quantum circuits, electronic spins... It is now possible to build "atom by atom" a synthetic quantum matter. By controlling the interactions between atoms, one can study the properties of these elementary many-body systems: quantum magnetism, transport of excitations, superconductivity...

Abstract:

Among all known isotopes, Thorium-229 has the lowest nuclear excited

state, only 8.4 eV above the ground state. This so-called "isomer" is

accessible to VUV laser excitation and has been proposed as a robust

clock transition for future frequency standards. The talk will present

most recent progress on measuring the exact nuclear excitation energy

and the isomer lifetime in a solid-state environment.

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