Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 57: Topology: Poster
TT 57.16: Poster
Mittwoch, 20. März 2024, 15:00–18:00, Poster E
Photonic noise spectroscopy of Majorana bound states — •Lena Bittermann1, Fernando Dominguez1, and Patrik Recher1,2 — 1Institut für Mathematische Physik, Technische Universität Braunschweig, D-38106 Braunschweig, Germany — 2Laboratory for Emerging Nanometrology Braunschweig, D-38106 Braunschweig, Germany
We propose a route to detect Majorana bound states (MBSs) by coupling a topological superconductor to quantum dots (QDs) in a pnp junction. Here, two MBSs are coherently coupled to the electron levels of the two QDs, and via electron-hole recombination, photons are emitted. We focus on the cross-correlated shot noise and the polarization of the emitted photons, and discuss the processes of crossed Andreev reflection, elastic cotunneling and local tunneling processes [1]. Our detection scheme allows us to probe the existence of non-local triplet superconducting correlations and that two MBSs comprise a single fermion [2]. We compare our results to the ones obtained from quasi-Majorana bound states [3], giving rise to signatures that deviate from the MBSs scenario.
[1] L. Bittermann, C. De Beule, D. Frombach, P. Recher, PRB 106, 075305 (2022).
[2] A. Y. Kitaev, Phys.-Usp. 44, 131 (2001).
[3] G. Kells, D. Meidan, P. W. Brouwer, PRB 86, 100503(R) (2012).
Keywords: Majorana bound states; cross-correlated shot noise; photon emission; quantum dots; nonlocality