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Emergent Bell Phase in an Electro-Nanomechanical Quantum Simulator

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arxiv 2511.02613 v2 pith:WA2LNMDI submitted 2025-11-04 quant-ph cond-mat.mes-hall

Emergent Bell Phase in an Electro-Nanomechanical Quantum Simulator

classification quant-ph cond-mat.mes-hall
keywords quantumbellcarboncouplingdotshostingnanotubesphase
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Suspended carbon nanotubes hosting electrostatically defined quantum dots allow for exceptionally strong and tunable electromechanical coupling as well as mechanical modes that can reach the quantum ground state of motion simply by cryogenic cooling. This makes them a unique platform for quantum simulation of electron-phonon coupling. Here, we propose an experimentally realisable setup with two such carbon nanotubes in parallel, each hosting four quantum dots. Our system not only exhibits phonon-mediated electron-electron attraction, but also supports a robust, maximally entangled Bell phase at mesoscopic scales shared across the subsystems. These features highlight its potential as a simulator of strongly correlated quantum systems.

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