Prof. Dr. Peter Rabl, TU Munich / Walther-Meißner-Institute

Leuchs-Russell Auditorium, A.1.500, Staudtstr. 2

Location Details

Abstract
In this talk, I will discuss the autonomous distribution of entanglement in quantum networks of qubits driven by squeezed or thermal light. In the first part, I will review some of our previous work on generating two-qubit as well as multi-qubit entangled states in a dual-rail waveguide QED system [1] by simply driving the qubits with a two-mode squeezed photon source and I will present some of the first experimental demonstrations of this scheme with superconducting circuits [2]. In the second part, I will then show that even a purely thermal photon source can generate highly entangled states between two spatially separated qubits, provided the photonic reservoir is sufficiently narrow-band, i.e., strongly non-Markovian [3]. I will explain the underlying mechanisms that lead to this surprising effect and discuss how it could potentially be used as a purely passive scheme to entangle superconducting qubits via room-temperature Johnson–Nyquist noise.

[1] J. Agustí, X. H. H. Zhang, Y. Minoguchi, and P. Rabl, Phys. Rev. Lett. 131, 250801 (2023).
[2] A. Andrés-Juanes, J. Agustí, R. Sett, E. S. Redchenko, L. Kapoor, S. Hawaldar, P. Rabl, and J. M. Fink, arXiv:2510.07139.
[3] J. Agustí, C. M. F. Schneider, K. G. Fedorov, S. Filipp, and P. Rabl, arXiv:2506.20742.