Quantum Technology Initiative Journal Club

Thursday 3 Jul 2025, 16:00 → 17:00 Europe/Zurich

513/R-070 - Openlab Space (CERN)

Michele Grossi (CERN)

Weekly Journal Club meetings organised in the framework of the CERN Quantum Technology Initiative (QTI) to present and discuss scientific papers in the field of quantum science and technology. The goal is to help researchers keep track of current findings and walk away with ideas for their own research. Some previous knowledge of quantum physics would be helpful, but is not required to follow the talks.

To propose a paper for discussion, contact: michele.grossi@cern.ch

CERN QTI Journal CLUB

Convener: Dr Michele Grossi (CERN)

1 João Barata

TITLE: Real-time simulation of jet energy loss and entropy production in high-energy scattering with matter

LINK to the PAPER: https://arxiv.org/abs/2502.17558

ABSTRACT:
In analogy to high-energy nuclear scattering experiments, we study a real-time scattering process between a propagating state and a dense target in 1 + 1-d massive QED. In our setup, we identify three distinct regimes that qualitatively characterize the evolution: for a dilute medium, the
incoming probe state evolves nearly ballistically; in an intermediate setting, it traverses the matter, locally exciting it; and for dense targets, one approaches a black-disk limit, where the matter acts as
a strong wall potential. We find evidence that the probe’s energy loss rate scales linearly with the path length in the medium, and we study how the entanglement entropy reveals the mixing between the probe and medium states. With the goal of one day replicating high-energy nuclear experiments in quantum devices, we briefly discuss how the current tensor network-based simulations can be translated to a quantum simulator.

Speaker: Joao Lourenco Henriques Barata