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Matthew Buican, Some Applications of Free Supersymmetric Fields (2:30 PM - 3:45 PM)

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-- Abstract: There is a recent realization that the properties of a material can be modified just by placing it in an optical cavity. The quantum vacuum fields surrounding the material inside the cavity can cause nonintuitive modifications of electronic states, producing a vacuum-dressed material with novel properties. Existing theoretical predictions include cavity-enhanced, cavity-induced, and cavity-mediated enhancement of electron–phonon coupling and superconductivity, electron pairing, anomalous Hall effect, ferroelectric phase transitions, quantum spin liquids, and photon condensation. The so-called ultrastrong coupling (USC) regime is a prerequisite for observing these effects, which arises when the interaction energy becomes a significant fraction of the bare photonic mode and matter excitation frequencies [1]. Most intriguingly, when a material is ultrastrongly coupled with cavity-enhanced vacuum electromagnetic fields, its ground state will contain virtual photons. This nonperturbative virtual driving without external fields can lead to phase transitions in thermal equilibrium. This talk will describe our recent studies of USC phenomena in various solid-state cavity quantum electrodynamics systems in search of such vacuum-induced phases of matter [2–11]. We utilize the phenomenon of Dicke cooperativity [5,12], i.e., many-body enhancement of light–matter interaction, to explore quantum-optical strategies for creating, controlling, and utilizing novel phases in condensed matter enabled by the quantum vacuum.

Zare (3:30 PM - 5:30 PM)

Thomas Steingasser, Higgs criticality in and beyond the Standard Model (2:00 PM - 3:00 PM)

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Fiona Seibold, Scattering on effective strings and compactified membranes (4:00 PM - 5:15 PM)

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, Grad Pheno Journal Club (3:30 PM - 4:45 PM)

Luca Delacrétaz, Bound on thermalization from hydrodynamic fluctuations (2:00 PM - 3:15 PM)

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Federico Ambrosino, Exploring mesons in Generalized QCD_2 with integrability (12:00 PM - 1:15 PM)

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Zare (3:30 PM - 5:30 PM)

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, Grad Pheno Journal Club (3:30 PM - 4:45 PM)

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Xingyang Yu, Stringy Approach to SymTFTs and Categorical Symmetries (2:00 PM - 3:15 PM)

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Abhay Narayan Pasupathy, Teaching an Old Dog Some New Tricks (4:00 PM - 5:30 PM)

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Alon Farragi, String Derived Z′ Model at an Upgraded Superconducting Super Collider (12:30 PM - 1:45 PM)

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Chris Hull, The action for self-dual p-form gauge fields and the geometry of gravitons (2:00 PM - 3:15 PM)

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Bingrong Yu, Axion dark matter from inflation-driven quantum phase transition (2:00 PM - 3:00 PM)

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, Grad Pheno Journal Club (3:30 PM - 4:45 PM)

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Reza Javadi Nezhad, Soft Symmetries in Gauge Theories (2:00 PM - 3:30 PM)

Zare (3:45 PM - 5:30 PM)