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TT: Fachverband Tiefe Temperaturen
TT 15: Topology: Majorana Physics
TT 15.7: Vortrag
Montag, 9. März 2026, 16:30–16:45, HSZ/0105
Poor man's Majorana bound states in quantum dot based Kitaev chain coupled to a photonic cavity — •Francesco Buonemani1, Alvaro Gomez-Leon2, Marco Schiro3, and Olesia Dmytruk1 — 1CPHT, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France — 2Institute of Fundamental Physics IFF-CSIC, Calle Serrano 113b, 28006 Madrid, Spain — 3JEIP, UAR 3573 CNRS, College de France, PSL Research University, 11, place Marcelin Berthelot, 75231 Paris Cedex 05, France
Majorana bound states (MBSs) in topological superconductors, given their robustness against external perturbations, are the ideal building blocks for quantum computation. In light of this, poor man's Majorana bound states (PMMBSs), isolated zero-energy bound states, promise to engineer Majorana bound states in a highly tunable setup consisting of a chain of quantum dots that are connected via superconductors.
We analyze the interaction between the minimal microscopic dot chain with proximity-induced superconductivity for PMMBSs and a single mode photonic cavity. We showed how the coupling to the light in the microscopic model leads to a different phenomenology compared to the case where the coupling was introduced in the two-site Kitaev chain model. Thus, we demonstrated that even starting from the microscopic quantum dot model coupled to photons, it is possible to control the sweet spot condition, for the emergence of PMMBSs, through the cavity parameters.
Keywords: Majorana Bound States; Poor man's Majorana Bound States; Quantum Dots; Light-Matter coupling