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arXiv · 2511.22577

Engineering the localization transition in a Charge-Kondo circuit

Zhanyu Ma·Cheolhee Han·F. Pierre·Eran Sela
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Abstract

Charge Kondo circuits consist of metallic islands connected by single-mode quantum point contacts (QPCs). The island's charging energy makes these circuits tunable quantum simulators of various strongly interacting models. Here we propose a circuit that realizes the Kondo effect with effective Luttinger-liquid interactions, and show that it undergoes a localization transition in which the QPC transmission is fully suppressed below a critical value. Experimental signatures include a diverging charge susceptibility and an entropy step. Our findings open a path toward realizing localization transitions in more exotic settings.

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Zhanyu Ma, Cheolhee Han, F. Pierre, Eran Sela. 2025-11-27. Engineering the localization transition in a Charge-Kondo circuit. https://arxiv.org/abs/2511.22577

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