JILA X317
Towards quantum simulation of strongly interacting topological matter
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The interplay of topological order and strong interactions gives rise to exciting many-body physics such as the fractional quantum Hall effect, whose microscopic properties can be unveiled using neutral atom-based quantum simulators. However, the experimental challenges due to the need to engineer an artificial magnetic field, especially in presence of interactions, have so far limited possible studies to small systems with few particles.
A New Dimension: Bilayer Crystals of Trapped Ions for Quantum Information Processing
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Abstract: Trapped ion systems are a leading platform for quantum information processing, but they are currently limited to 1D and 2D arrays, which imposes restrictions on both their scalability and their range of applications.
Measuring How Students Measure
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Abstract: Physics education research in undergraduate laboratory courses is vital to ensure that these courses achieve their learning goals, such as developing hands-on technical skills and mastering concepts and practices related to measurement uncertainty. In this talk, I cover my role in developing a research-based assessment instrument, the Survey of Physics Reasoning on Uncertainty Concepts in Experiments (SPRUCE).
Adiabatic passage and geometric phases: are they hot or not?
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In this informal seminar I will present an appraisal of adiabatic passage which transforms quantum states much better than one should expect (and I will explain why this is the case). And I will discuss an often stated claim that geometric phases, used in many gate proposals for quantum computing, are particularly robust because of their geometric character (and I will explain why I think this is not the case).
A high optical access cryogenic optical tweezer array
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Abstract: Arrays of single trapped neutral atoms are an important platform for quantum metrology, simulation, and information processing. Interacting Rydberg atom arrays have undergone rapid scaling in qubit numbers and improvements in coherent control in recent years. Placing Rydberg atoms inside a cryogenic environment is of interest for reducing background gas collisions and blackbody radiation-induced decay.
Realization of a Quantum-Optical Spin Glass
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Abstract: Spin glasses—large-scale networks of spins with deeply frustrated interactions—are canonical examples of complex matter. Although much about their structure remains uncertain, they inform the description of a wide array of complex phenomena, ranging from magnetic ordering in metals with impurities to aspects of evolution, protein folding, climate models, and combinatorial optimization. Indeed, spin glass theory forms a mathematical basis for neuromorphic computing and brain modeling.
Quantum materials as a possible host for new kinds of hydrodynamics
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The past decade has seen a huge wave of interest in the possibility of hydrodynamic transport of electrons and/or phonons in quantum materials. There are now dozens of experiments that are approaching consensus on a weakly viscous hydrodynamic regime in e.g. monolayer graphene.
Tabletop Coherent Extreme Ultraviolet Metrology and Imaging of Nanostructures
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Abstract: Nanoscale fabrication has progressed to the level where detailed near nanometer structure can be routinely produced. As fabrication scales shrink to atomistic scales, a corresponding need for high precision characterization is in demand. The use of extreme ultraviolet light (EUV) for patterning of small-scale features has seen considerable development and application in recent years.
Extreme Ultraviolet Spectroscopy of Ultrafast Excitations in Magnetic Alloys
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The next generation of logic devices may rely on very fast switching of magnetic states. In this thesis, I utilize ultrafast pulsed lasers to measure and manipulate magnetic states on their fundamental timescales: ranging from few-femtoseconds spin-transfers in Heusler alloys to magnetization reorientations in ferrimagnets which take tens of picoseconds. I utilize high harmonic generation to produce a tabletop extreme ultraviolet probe for resonant measurements.