Dresden 2026 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

QI: Fachverband Quanteninformation

QI 14: Quantum Information Poster Session

QI 14.3: Poster

Wednesday, March 11, 2026, 18:00–21:00, P4

Non-perturbative approach to entanglement harvesting — •Fabian Ganzer, Mei Yu, and Walter Strunz — Institute for Theoretical Physics, TU Dresden

It has been shown that two localized quantum systems like qubits or atoms can harvest entanglement from a quantum vacuum field through local interactions [1]. This phenomenon is often interpreted as a buildup of quantum correlations that can be established faster than with the speed of light due to a vacuum field. To date, however, most investigations have relied on perturbative approaches, leaving the genuine non-perturbative dynamics largely unexplored. In this work, we study entanglement harvesting using the non-perturbative numerical uniTEMPO method [2], enabling us to access both the weak- and strong-coupling regimes. Our results demonstrate that reliable statements about entanglement harvesting require both, a non-perturbative method and a careful analysis of correlations, particularly quantum correlations.

[1] C. Sabín, J. J. García-Ripoll, E. Solano, and J. León, Dynamics of entanglement via propagating microwave photons, Phys. Rev. B 81, 184501 (2010)

[2] V. Link, H.-H. Tu and W. T. Strunz, Open quantum system dynamics from infinite tensor network contraction, Phys. Rev. Lett. 132, 200403 (2024)

Keywords: concurrence; non-perturbative; strong coupling; entanglement harvesting; correlations