JILA Auditorium

When Noise is the Signal: Highlights in Qubit-Based Quantum Spectral Estimation

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Abstract: Accurate characterization and control of open quantum systems exposed to realistic, spatio-temporally correlated noise are vital for exploiting the full potential of quantum technologies. Thanks to their exquisite sensitivity to the surrounding environment, qubits can be naturally considered as “spectrometers”, or sensors, of their own noise.

Forces on Everything Everywhere All at Once

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Abstract: In order to perform some of their most important functions, cells must be able to generate, sense, and respond to mechanical forces. Many mechanosensing proteins have been discovered that are believed to change their behavior in a predictable and repeatable way when they are under mechanical tension. Yet, in most of these cases, we don't know the molecular details of how this force shifts the conformations adopted by the protein, or how this then leads to a concomitant change in function.

Vibrational Spectral Signatures and Ultrafast Dynamics of Strong H-bonds Investigated with Cryogenic Ion and 2D IR Spectroscopies

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Abstract: H-bonding interactions and proton transfer processes play central roles throughout chemistry and biology. Spectroscopic studies that directly probe strong H-bonds and proton transfer reactions, however, remain a formidable experimental challenge. We aim to characterize vibrational spectral signatures and dynamics of strong H-bonds by complementing high-resolution gas-phase techniques (cryogenic ion spectroscopy) with ultrafast time-resolved solution-phase experiments (transient absorption, 2D IR).

Complex and Heterogeneous Biophysical Systems Studied with 2DIR

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Abstract: I will present three projects. In the first two, we used two-dimensional infrared (2DIR) spectroscopy to study properties of some complex peptide and protein assemblies 1: Proline-arginine (PR) dipeptide repeats are an example of a growing number of intrinsically disordered proteins (IDPs) known to assemble into membrane-less organelles by liquid-liquid phase separation (LLPS), and has also been implicated in the disease mechanism of Amyotrophic lateral sclerosis (ALS).

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