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TT: Fachverband Tiefe Temperaturen
TT 15: Topology: Majorana Physics
TT 15.9: Vortrag
Montag, 9. März 2026, 17:15–17:30, HSZ/0105
Braiding of Majorana wave packets at surfaces of noncentrosymmetric superconductors — •Georg Heedt1, Clara Johanna Lapp1,2, Julia Monika Link1,2, and Carsten Timm1,2 — 1TU Dresden, 01062 Dresden, Germany — 2Würzburg-Dresden Cluster of Excellence ct.qmat, TU Dresden, 01062 Dresden, Germany
Broken inversion symmetry in noncentrosymmetric superconductors causes singlet-triplet mixing of Cooper pairs. If the triplet pairing is sufficiently strong flat zero-energy Majorana surface bands are expected. We describe such a system in terms of a finite concentration of localized Majorana wave packets, which may be promising for quantum computation. Moving Majorana wave packets along closed paths leads to braiding of Majorana modes. We determine the non-Abelian phase associated with this braiding. To that end, we construct an exact time-dependent many-particle Hamiltonian that describes the desired motion and show that the phase can efficiently be evaluated in an effective single-particle picture.
Keywords: Majorana; Braiding; Flat surface bands; noncentrosymmetric superconductors