[Theory-seminars] Theory Seminar TODAY

[Pia Jones Petrak]

Hello everyone,

We will be having a remote Theory seminar *today at 1pm*. Even though 
it's remote *please join us in F326-327 *or on Zoom. Below is the info.

Speaker: Iván Mauricio Burbano Aldana (UC Berkeley)


Zoom: 
https://jlab-org.zoomgov.com/j/1617081564?pwd=0Tr7fZACG5vyHvFjgaye73eQpUJ43l.1 
<https://jlab-org.zoomgov.com/j/1617081564?pwd=0Tr7fZACG5vyHvFjgaye73eQpUJ43l.1>


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 wishes,
Adam, Joe, and Pia
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