I will start with some comments about the theoretical and experimental status of conformal invariance in critical phenomena, first proposed by A. Polyakov in 1970. I will then focus on a couple of experimentally significant models of statistical physics (ferromagnets in presence of strong dipolar forces, fluctuating…

I will discuss the obstacles I have experienced as a female, non-native English speaker, and a first-generation college student with an F-1 visa enrolled in a PhD program in the US. I will give some pieces of advice to both the students who have a similar background and to the supervisors who mentor these students. I will also discuss some…

The Physics department looks forward to meeting and welcoming the Class of 2027 at the upcoming Academic Expo from 1:00pm to 4:00pm on August 28th in Frick Chemistry Laboratory.

This event is open to undergraduate students.

The key word in the title is “IN”. Unlike AdS where observers can be thought of as living on the boundary of space, or even in a laboratory beyond the boundary, in dS the observer is part of the system; he or she lives “in” the de Sitter spacetime. Even worse, observers are mere transient fluctuations that originate on…

In this talk, I will present my work at the Istituto Nazionale di Ricerca Metrologica in Turin, Italy. I will begin with an overview of single photon superconducting sensors, followed by an explanation of the theory behind superconducting transition edge sensors. Then, I will demonstrate the in-house fabrication process we employ.

…

I will discuss exoplanets as new targets to discover Dark Matter (DM). Throughout the Milky Way, DM can scatter, become captured, deposit annihilation energy, and increase the heat flow within exoplanets. I will show estimates for infrared telescope sensitivity to this scenario, finding actionable discovery or exclusion searches. Supporting…

"Saturons" are macroscopic objects that exhibit maximal micristate degeneracy within the validity of a given quantum field theoretic description. Due to this feature, saturons and black holes belong to the same universality class with common key properties. However, as opposed to black holes, saturons…

"Superconductors come in many varieties: we typically classify them based on the symmetry of their superconducting gap, such as *s, p, *or *d*-wave. This classification, however, does not tell the entire story because the superconducting gap can also have topological structure. One route to topological superconductivity is to…

Some aspects of the black hole spectrum, coming from spacetime wormhole contributions, can be modeled by a random matrix ensemble. It is important to understand the appropriate ensemble for theories with extended supersymmetry, since for example this is the case for systems with known gravity duals coming from string…

MAGIS-100 is a macroscopic ‘Quantum-Sensor’, based on a 100-meter light-pulse atom interferometer, being built at Fermilab by an international collaboration, in search of the “dark” sector of the universe (“dark” matter and energy) and “early-universe” gravitational wave background. The experiment can potentially search for new forces and test …

The technique of “Stochastic Cooling” of phase space of a particle beam, using microwave techniques in the GHz frequency range, has been employed historically in particle colliders, leading to ground-breaking discoveries. ‘Cooling’ increases the probability of interactions in colliding beams, thus enhancing the likelihood of observing rare…

In this talk, I will present a new systematic approach of constructing solvable lattice Hamiltonians for a large class of 2+1D topological orders, which are enriched by background Electromagnetic U(1) symmetry and feature non-trivial fractional Hall conductivity. This approach goes beyond the conventional fixed-point principle by considering…

Perhaps the most important problem in physics or quantum chemistry is to determine properties of the ground state of an interacting system of fermions. As a quantum mechanical problem, there may be no efficient classical witness to the ground state energy, or even to an approximation of that energy. A…

I will explain recent work with S. Mizera in which we give explicit evaluations of one-loop open string amplitudes at finite alpha’. Our method involves various deformations of the contour integral over the modular parameter. We directly verify that the one-loop string amplitude satisfies unitarity constraints. I…

Abstract: Measurements of rare Standard Model (SM) processes are now possible thanks to the large trove of collision data delivered by the LHC during its second data taking run. Of particular interest are heavy states including top quarks plus an additional heavy boson (ttH, ttW, and ttZ) and the simultaneous production of four top quarks…

In this talk I will focus on light dark matter particles, with a mass between 1 MeV and a few GeV. These particles can annihilate or decay into electron-positron pairs which can upscatter the low-energy fields in our Galaxy and produce X-ray emission. By using the X-ray data from XMM-Newton, Integral, Suzaku and NuStar, we derive strong…

While Laughlin identified the fractional quantum Hall state as a consequence of an “incompressible quantum fluid”, well-described by his model wavefunction which exhibits “flux attachment”, no fundamental explanation of the energetics driving “flux attachment” has emerged. A new picture reveals that a…

The CνB is a cosmological relic analogous to the CMB, and contains information about the universe before it was one-second-old. Reflection of relic neutrinos from the surface of the Earth creates a significant local neutrino-antineutrino asymmetry in a shell seven meters thick around the Earth's surface. This asymmetry…

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