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Two-level system as topological actuator for nanomechanical modes

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorDUTREIX, C.
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorAVRILLER, R.
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorLOUNIS, B.
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorPISTOLESI, F.
dc.date.issued2020
dc.identifier.issn2643-1564
dc.description.abstractEnWe investigate theoretically the dynamics of two quasidegenerate mechanical modes coupled through an open quantum two-level system. A mean-field approach shows that by engineering the retarded response of the two-level system with a coherent drive, the non-Hermitian mechanical spectrum exhibits an exceptional degeneracy point where the two modes coalesce. We show that this degeneracy can be exploited to manipulate the vectorial polarization of the mechanical oscillations. We find that adiabatically varying the detuning and the intensity of the drive induces a rotation of the mechanical polarization, which enables the topological and chiral actuation of one mode from the other. This topological manifestation of the degeneracy is further supported by quantum-jump Monte Carlo simulations to account for the strong quantum fluctuations due to the spontaneous emission of the two-level system. Our presentation focuses on a promising realization based on flexural modes of a carbon-nanotube cantilever coupled to a single-molecule electric dipole irradiated by a laser
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enTwo-level system as topological actuator for nanomechanical modes
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevResearch.2.023268
dc.subject.halPhysique [physics]/Physique Quantique [quant-ph]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]
dc.identifier.arxiv1907.11191
bordeaux.journalPhysical Review Research
bordeaux.page023268
bordeaux.volume2
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-02864896
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02864896v1
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