Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster – Quantum Systems
Q 43.13: Poster
Wednesday, March 4, 2026, 17:00–19:00, Philo 2. OG
Disorder-Enhanced and Disorder-Independent Transport with Long-Range Hopping: Application to Molecular Chains in Optical Cavities — Nahum C. Chávez1, •Francesco Mattiotti2, J. A. Méndez-Bermúdez3, Fausto Borgonovi1,4, and G. Luca Celardo5 — 1Dipartimento di Matematica e Fisica, Università Cattolica, Brescia, Italy — 2Theoretische Physik, Universität des Saarlandes, Saarbrücken, Germany — 3Benemérita Universidad Autónoma de Puebla, Instituto de Física, Mexico — 4INFN, Sezione di Milano, Milano, Italy — 5Department of Physics and Astronomy, University of Florence, Italy
Overcoming the detrimental effect of disorder at the nanoscale is very hard since disorder induces localization and an exponential suppression of transport efficiency. Here we unveil novel and robust quantum transport regimes achievable in nanosystems by exploiting long-range hopping. We demonstrate that in a 1D disordered nanostructure in the presence of long-range hopping, transport efficiency, after decreasing exponentially with disorder at first, is then enhanced by disorder [disorder-enhanced transport (DET) regime] until, counterintuitively, it reaches a disorder-independent transport (DIT) regime, persisting over several orders of disorder magnitude in realistic systems. To enlighten the relevance of our results, we demonstrate that an ensemble of emitters in a cavity can be described by an effective long-range Hamiltonian. The specific case of a disordered molecular wire placed in an optical cavity is discussed, showing that the DIT and DET regimes can be reached with state-of-the-art experimental setups.
Keywords: disorder; transport; long-range hopping; cavity QED; molecular chains