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Events on Monday, April 14th, 2025

Atomic Physics Seminar
Hamiltonian Engineering using synthetic dimensions
Time: 11:00 am
Place: 5310 Chamberlin Hall
Speaker: Shraddha Agrawal, UIUC
Abstract: Hamiltonian engineering can provide insights into the control and manipulation of quantum systems, which may pave the way for progress in quantum sensing and quantum many-body physics. Here, I will focus on a specific type of Hamiltonian engineering technique based on the spectroscopic coupling of atomic states. I will describe how we use two-photon Bragg resonances to couple discrete momentum states of our BEC, forming a synthetic lattice of momentum states in one dimension. Taking advantage of the site-resolved control afforded by our synthetic lattice technique, I will show some experimental results regarding transport in a one-dimensional quasiperiodic mosaic lattice. I will then discuss two-dimensional momentum state lattices. Finally, I will offer prospective directions in leveraging atomic interactions to probe many-body topological physics and squeezed states in our experimental platform.
Host: Mark Saffman
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Plasma Physics (Physics/ECE/NE 922) Seminar
"A Ritz variational principle for local collisionless gyrokinetic instabilities"
Time: 12:00 pm - 1:15 pm
Place: 1227 Engineering Hall
Speaker: Cole Stephen, University of Texas at Austin
Abstract: Turbulence driven by gyrokinetic instabilities is largely responsible for transport in magnetic fusion devices. To estimate this turbulent transport, integrated modeling codes often use mixing length estimates in conjunction with reduced models of the linearized gyrokinetic equation. One common method of formulating and solving the linearized gyrokinetic eigenvalue problem equation uses a Ritz variational principle, particularly in the local collisionless limit. However, the variational principle as typically stated in the literature is mathematically incorrect. In this work, we derive a mathematically correct form of the variational principle that applies to local linear collisionless gyrokinetics in general geometry with electromagnetic effects. We also explicitly derive a weak form of the gyrokinetic field equations suitable for numerical applications.
Host: Prof. Adelle Wright
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GMaWiP
Research Presentations
Time: 4:00 pm - 6:00 pm
Place: Chamberlin Hall Room 5280
Abstract: GMaWiP and the Physics Department are hosting a low-pressure research symposium featuring talks by the following graduate and undergraduate students: Julian Beas-Gonzalez; M. Clark; Michael Martinez; Nicholas Tallon
Host: Julia Sheffler
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