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arXiv · 2607.00520

Real-time dynamics of triplet-resonant tunneling driven by nonequilibrium phonons

Kazuyuki Kuroyama·Sasha R. Valentin·Arne Ludwig·Andreas D. Wieck·Yasuhiro Tokura·Seigo Tarucha·Sadashige Matsuo
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Abstract

Driven nonequilibrium systems can host emergent functionalities beyond equilibrium, but real-time access to excited-state dynamics remains limited. Here we report real-time measurements of phonon-driven charge and spin dynamics in excited states of a double quantum dot. Under phonon irradiation, resonant inter-dot tunneling emerges at triplet resonance. Time-resolved charge sensing reveals that the resonant inter-dot tunneling is strongly modified by spin blockade. For weaker inter-dot coupling, the nonequilibrium phonon environment generates a unidirectional transport cycle along the phonon density gradient.

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Kazuyuki Kuroyama, Sasha R. Valentin, Arne Ludwig, Andreas D. Wieck, Yasuhiro Tokura, Seigo Tarucha, Sadashige Matsuo. 2026-07-01. Real-time dynamics of triplet-resonant tunneling driven by nonequilibrium phonons. https://arxiv.org/abs/2607.00520

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