English

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

Mesoscale and Nanoscale Physics 2026-07-01 v1
Authors: 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.

Keywords

double quantum dot phonon-driven dynamics triplet resonance spin blockade real-time measurements charge sensing

Cite

@article{arxiv.2607.00520,
  title  = {Real-time dynamics of triplet-resonant tunneling driven by nonequilibrium phonons},
  author = {Kazuyuki Kuroyama and Sasha R. Valentin and Arne Ludwig and Andreas D. Wieck and Yasuhiro Tokura and Seigo Tarucha and Sadashige Matsuo},
  journal= {arXiv preprint arXiv:2607.00520},
  year   = {2026}
}