Seminar detail: Probing New Physics with Quantum Process Tomography at Colliders

Date&Time	Wed Jan 28 2026 (13:30 - 14:30)
Speaker	Kazuki Sakurai
Affiliation	Warsaw Univ.
Title	Probing New Physics with Quantum Process Tomography at Colliders
Abstract	The potential of treating particle colliders as natural quantum information processors is beginning to be explored, opening a new frontier at the intersection of high-energy physics and quantum information theory. In this talk, I will present a novel framework for performing quantum process tomography at high energies, with a focus on its application to top–antitop production at a polarised lepton collider. By modeling the collider process as a quantum instrument, we reconstruct its associated Choi matrix, providing a complete characterization of the quantum evolution encoded in the scattering event. This approach enables experimental tests of the very foundations of quantum mechanics beyond the weak scale, where potential breakdowns might emerge. Moreover, the methodology offers a powerful and systematic strategy for probing potential extensions of the Standard Model within the conventional QFT framework.
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