2024-04-05 Seminar Report

The seminar on "Quantum Simulation of QCD Matter: from Hadronic Scattering to Gauge Field Qubit Encoding" delivered by Tianyin Li, a Ph.D. candidate at the Institute of Quantum Matter, South China Normal University, offered profound insights into the burgeoning field of quantum computing (QC) and its application in high-energy physics.

His talk commenced with an overview of how quantum computing is revolutionizing the approach to non-perturbative problems in high-energy physics. Unlike traditional Monte Carlo simulations, which are hindered by the sign problem, quantum computing presents a viable solution for exploring dynamical and finite density problems without this limitation.

Tianyin further provided an in-depth analysis of the quantum simulation of the hadronic scattering process. This included a discussion on the initial state parton distribution functions, the computation of intermediate state partonic scattering amplitudes, and the mechanisms of final state hadronization. This segment illustrated the potential of QC to offer new perspectives and methodologies in understanding the complexities of hadronic interactions.

The final part was dedicated to the innovative approach of qubit encoding within the Hamiltonian formalism of lattice gauge field theory, particularly in the Coulomb gauge. The focus was primarily on a practical attempt to encode the (3+1)-dimensional Coulomb gauge QED into qubits. iTHEMS and RIKEN Quantum members proposed many questions and comments on this topic, which stimulated very fruitful discussions.

In summary, this seminar underscored the importance of interdisciplinary collaboration between the fields of quantum computing and high-energy physics, promising exciting developments in the years to come.

Reported by Lingxiao Wang

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