Engineering the localization transition in a Charge-Kondo circuit

2025/11/27 by Zhanyu Ma, Cheolhee Han, Ma, Zhanyu +5
Physics and Astronomy · Chemistry · Materials Science · #Quantum and electron transport phenomena #Advanced Physical and Chemical Molecular Interactions #Chemical and Physical Properties of Materials

paper · pdf · doi:10.48550/arxiv.2511.22577

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.

Citations

• Metallic island array as synthetic quantum matter: fractionalized entropy and thermal transport
• Breakdown of the Wiedemann-Franz law in an interacting quantum Hall metamaterial
• Universal Crossover in the Three-Channel Charge Kondo Model at High Transparency
• Realizing the interacting resonant level model using a quantum dot detector
• Giant Heat Flux Effect in Non-Chiral Transmission Lines

Related

• Kondo Effect in Quantum Dots Coupled to Luttinger Liquid Leads
• Pseudogap Kondo Physics from Charge Fluctuations in a Quantum Dot
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• Universal Crossover in the Three-Channel Charge Kondo Model at High Transparency
• Measuring Luttinger Liquid Correlations from Charge Fluctuations in a Nanoscale Structure