Joint ICTP/SISSA Statistical Physics Seminar, 26 May at 11:00am, by Y. Chai

[CMSP Seminars Secretariat]

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Joint ICTP/SISSA Statistical Physics Seminar
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** * * Tuesday 26 May**2026, 11:00**am ***(CET)** * **
*Euler Lecture Room **(Leonardo Building, terrace level)***
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/Zoom: https://zoom.us/meeting/register/4yNLtWXiSh23SmHnYts1iA/

Speaker:* Yahui Chai *(Deutsches Elektronen-Synchrotron DESY)

Title:* Quantum Simulation of Real-Time Scattering Dynamics in 
High-Energy Physics **
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Abstract:

Real-time dynamics is central to high-energy physics, underlying 
processes such as particle scattering and the extraction of parton 
distribution functions (PDFs). However, nonperturbative real-time 
simulation remains challenging for classical methods due to sign 
problems and rapidly growing entanglement, making quantum computing a 
promising alternative.

In this talk, I will present our recent progress on quantum simulations 
of particle scattering in (1+1)D lattice field theories. I will first 
discuss meson scattering in Z2 lattice gauge theory, focusing on the 
construction of stable particle creation operators and efficient quantum 
circuits. Using tensor network simulations, we observe both elastic and 
inelastic scattering, including particle production, entanglement 
growth, and the formation and breaking of extended flux strings. I will 
then present a hardware implementation of fermion scattering in the 
Thirring model on IBM Quantum devices with 40 and 80 qubits, where 
tensor-network-based circuit optimization and error mitigation enable 
results that closely match ideal simulations. Finally, I will briefly 
discuss ongoing directions, including resonance states in scattering and 
PDFs of the scalar meson in the Schwinger model.