Todos os Eventos

Amanhã, excepcionalmente, teremos 2 seminários de Física da Matéria Condensada. 

 

Além da palestra do Prof. Dario Bahamon, já anunciada, teremos a palestra de Fernando Iemini, em processo de contratação pelo nosso departamento. 

 

Seminário EXTRA de Física da Matéria Condensada

03/05 - 5a feira - 16h00
Sala 429 - 4o andar da torre nova

Palestrante: Fernando Iemini (ICTP-Trieste/UFF) 

 

Título: Majorana Fermions in Number Conserving Systems

Abstract: In this seminar I will show how angular momentum conservation
can stabilise a symmetry-protected quasi-topological phase of matter
supporting Majorana quasi-particles as edge modes in one-dimensional cold
atom gases. We investigate a number-conserving four-species Hubbard model
in the presence of spin-orbit coupling. The latter reduces the global spin
symmetry to an angular momentum parity symmetry, which provides an
extremely robust protection mechanism that does not rely on any coupling
to additional reservoirs. The emergence of Majorana edge modes is
elucidated using field theory techniques, and corroborated by
density-matrix-renormalization-group simulations. Our results pave the way
toward the observation of Majorana edge modes with alkaline-earth-like
fermions in optical lattices, where all basic ingredients for our recipe -
spin-orbit coupling and strong inter-orbital interactions - have been
experimentally realized over the last two years.