BHATTACHARYA, Utso; GRASS, Tobias; BACHTOLD, Adrian; LEWENSTEIN, Maciej; PISTOLESI, Fabio

doi:10.1021/acs.nanolett.1c03457

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BHATTACHARYA, Utso
Institut de Ciencies Fotoniques [Castelldefels] [ICFO]
Max-Planck-Institut für Quantenoptik [MPQ]

GRASS, Tobias
Institut de Ciencies Fotoniques [Castelldefels] [ICFO]

BACHTOLD, Adrian
Institut de Ciencies Fotoniques [Castelldefels] [ICFO]

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Ce document a été publié dans

Nano Letters. 2021, vol. 21, n° 22, p. 9661 - 9667

American Chemical Society

Résumé en anglais

Quantum simulations can provide new insights into the physics of strongly correlated electronic systems. A well-studied system, but still open in many regards, is the Hubbard−Holstein Hamiltonian, where electronic repulsion is in competition with attraction generated by the electron−phonon coupling. In this context, we study the behavior of four quantum dots in a suspended carbon nanotube and coupled to its flexural degrees of freedom. The system is described by a Hamiltonian of the Hubbard−Holstein class, where electrons on different sites interact with the same phonon. We find that the system presents a transition from the Mott insulating state to a polaronic state, with the appearance of pairing correlations and the breaking of the translational symmetry. These findings will motivate further theoretical and experimental efforts to employ nanoelectromechanical systems to simulate strongly correlated systems with electron−phonon interactions.< Réduire

Mots clés en anglais

superconductivity

electron−phonon coupling

charge order

nanotubes

Quantum simulation

DOI

http://dx.doi.org/10.1021/acs.nanolett.1c03457

Project ANR

Nano-optomécanique en cavité dans le régime de couplage ultrafort. - ANR-19-CE47-0012

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798