Berlin 2018 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 28: Poster Session: Topological Topics
TT 28.13: Poster
Monday, March 12, 2018, 15:00–19:00, Poster B
Measuring the spin structure of Majorana bound states using optical quantum dots — •Lena Bittermann1 and Patrik Recher1,2 — 1Institut für Mathematische Physik, TU Braunschweig — 2Laboratory for Emerging Nanometrology Braunschweig
Since signatures of Majorana bound states have been found, a lot of research in this field was initiated. Despite of this, their spin structure [1] is still not well understood.
In a one dimensional semiconducting wire on top of a superconductor with an applied Zeeman field, Majorana bound states can arise at the ends of the wire to which quantum dots can be coupled [2]. Here we propose such a setup where two optical quantum dots are also connected to hole reservoirs so that photons can be created via recombination. We first perform a Schrieffer-Wolff transformation to receive the effective low energy model of the electronic system with weak coupling between the dots and the Majorana bound states. Furthermore, we use a master equation formalism to obtain the steady state solution. By analyzing the resulting photon emission spectrum, we investigate the corresponding processes of recombination to draw conclusions on the spin polarization of the Majorana bound states.
D. Sticlet, C. Bena and P. Simon, PRL 108, 096802 (2012)
M. T. Deng et al., Science 354, 1557 (2016)