ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT ttk.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

nov. 10. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Oroszlány László (ELTE TTK, Komplex Rendszerek Fizikája Tanszék):
A simple electronic ladder model harbouring Z4 parafermions

Parafermions are anyons with the potential for realizing non-local qubits
that are resilient to local perturbations. Compared to Majorana zero modes,
braiding of parafermions implements an extended set of topologically
protected quantum gates. This, however, comes at the price that
parafermionic zero modes can not be realized in the absence of strong
interactions whose theoretical description is challenging. In the present
work, we construct a simple lattice model for interacting spinful electrons
with parafermionic zero energy modes. The explicit microscopic nature of
the considered model highlights new realization avenues for these exotic
excitations in recently fabricated quantum dot arrays. By density matrix
renormalization group calculations, we identify a broad range of
parameters, with well-localized zero modes, whose parafermionic nature is
substantiated by their unique 8 pi -  periodic Josephson spectrum.


Minden érdeklődőt szeretettel várunk.
Asbóth János,
 szemináriumi koordinátor