[Theory-seminars] Theory Seminar Monday

[Joseph Karpie]

Hello everyone,

We will be having a seminar Monday by Ivan Mauricio Burbano Aldana (UC Berkeley) at 1pm in F326-327

Title: Real-time Estimators of Scattering Observables

Abstract: The real-time correlators of quantum field theories can be directly probed through new approaches to simulation, such as quantum computing and tensor networks. This provides a new framework for computing scattering observables in lattice formulations of strongly interacting theories, such as lattice quantum chromodynamics. In this talk, we will go over the proof given in arXiv: 2506.06511, showing that the proposal of Real-time Estimators of Scattering Observables is universally applicable to all scattering observables of gapped quantum field theories. All finite-volume errors are exponentially suppressed, and the rate of this suppression is controlled by the regulator considered, namely, a displacement of the spectrum of the theory into the complex plane. A partial restoration of Lorentz symmetry by averaging over different boosts gives an additional suppression of finite volume errors. Our results also apply to the simulation of wavepacket scattering, where a similar averaging is performed to construct the wavepackets that regulate the finite volume effects. We also comment on potential applications of our results to traditional computational schemes.

Best,
Joe

--
Joe Karpie
Pronouns: He/His/Him
Postdoctoral Fellow
Theoretical and Computational Physics Center
Jefferson Lab

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