Events at 402 Classroom Physics South Hall, Campus

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Abstract: We give further evidence that the matrix-tensor model studied in [arXiv:2308.03829] is dual to AdS3 gravity including the sum over topologies. This provides a 3D version of the duality between JT gravity and an ensemble of random Hamiltonians, in which the matrix and tensor provide random CFT2 data subject to a potential that incorporates the bootstrap constraints. We show how the Feynman rules of the ensemble … Read More

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Abstract: Perverse schobers refer to perverse sheaves of (enhanced) triangulated categories, as introduced by Kapranov-Schechtman. Though their general theory remains conjectural, there exists a robust theory of perverse schobers on surfaces with boundary. In the talk, we will discuss how such perverse schobers naturally arise from cosheaves of Fukaya categories of Lefschetz fibrations constructed by Ganatra-Pardon-Shende. For instance, in the … Read More

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Abstract: I will discuss two current projects, both relating to DM direct detection in the “light DM” mass range. In the first, we perform the first high-throughput search for materials that can serve as excellent low-mass DM detectors. Using properties of over 1000 materials from the Materials Project database, we project the sensitivity for both absorption and scattering processes between … Read More

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Abstract: Holographic conformal field theories exhibit dramatic changes in the structure of their operator algebras in the limit where the number of local degrees of freedom (N) becomes infinite. An important example of such phenomena is the violation of the additivity property for algebras associated to local subregions. I will first review several examples of superadditive algebras in quantum field theory and … Read More

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Axions and axion-like particles (ALPs) can have weak couplings to the Standard Model which may be magnified in extreme astrophysical environments, i.e. stars, providing unique and exciting pathways toward observational signatures. In this talk, I will discuss the novel idea of how axion production at the galactic stellar population level can manifest in particularly powerful probes for axion physics. In … Read More

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Abstract: Dark matter dominated dwarf galaxies are excellent targets to constrain thermal dark matter annihilation, due to their clean background in gamma-ray regime. However, the common practice in the community for estimating the J-factor, a key component in calculating the strength of the annihilation signal, may be prone to systematic uncertainties. In this talk, I will discuss a new method … Read More

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We count holomorphic curves in complex 3-space with boundaries on three special Lagrangian solid tori. The count is valued in the HOMFLYPT skein module of the union of the tori. Using 1-parameter families of curves at infinity, we derive three skein valued operator equations which must annihilate the count, and which dequantize to a mirror of the geometry. We show … Read More

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Abstract: We construct L-functions for general modular-invariant 2D CFTs, providing an analytic language for studying high-energy spectra and their resolution. We apply this tool to the modular bootstrap at large central charge. This leads to some considerations of chaos and spectral rigidity in 2D CFT.