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Physics & Astronomy Quantum Nano Seminar - Jose Polo Gomez, Univ. of Waterloo

Title: "Measuring quantum fields with particle detectors and machine learning"

11/12/2024
4 pm – 5 pm
Wilder 115
Intended Audience(s): Public
Categories: Arts and Sciences, Lectures & Seminars
Abstracct: Since the 1990s, we know that the way we model measurements in standard quantum mechanics cannot be extended to quantum field theory, because projective measurements conflict with relativity. In this talk, I will show that one can build a measurement theory for QFT using particle detectors---non-relativistic quantum mechanical systems that interact with quantum fields---because measurements performed on detectors do not violate causality, and one can prescribe an update rule consistent with relativity. I will also talk about how the evolution of the detector and the field---which is usually computed using perturbation theory---can be approximated non-perturbatively with trains of instantaneous interactions. Finally, I will illustrate how the information from the measurements can be decoded using a neural network, enabling us to asymptotically measure essentially any local observable of the field, and even global ones, under certain assumptions about the global field state.
 
Hosted by Professor Miles Blencowe
 
 
For more information, contact:
Tressena Manning
tressena.a.manning@dartmouth.edu
603-646-2854
Permanent URL to this event: https://physics.dartmouth.edu/events/event?event=76048

Events are free and open to the public unless otherwise noted.