Reference : Emission of entangled Kramers pairs from a helical mesoscopic capacitor
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/27425
Emission of entangled Kramers pairs from a helical mesoscopic capacitor
English
Dolcetto, Giacomo mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Schmidt, Thomas mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
30-Aug-2016
Physical Review B
American Physical Society
94
7
075444
Yes (verified by ORBilu)
International
2469-9950
2469-9969
[en] The realization of single-electron sources in integer quantum Hall systems has paved the way for exploring electronic quantum optics experiments in solid-state devices. In this work, we characterize a single Kramers pair emitter realized by a driven antidot embedded in a two-dimensional topological insulator, where spin-momentum locked edge states can be exploited for generating entanglement. Contrary to previous proposals, the antidot is coupled to both edges of a quantum spin Hall bar, thus enabling this mesoscopic capacitor to emit an entangled two-electron state. We study the concurrence $C$ of the emitted state and the efficiency $F$ of its emission as a function of the different spin-preserving and spin-flipping tunnel couplings of the antidot with the edges. We show that the efficiency remains very high ($Fgeq 50) even for maximally entangled states ($C=1$). We also discuss how the entanglement can be probed by means of noise measurements in a simple two-terminal setup.
Fonds National de la Recherche - FnR
http://hdl.handle.net/10993/27425

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
dolcetto16a.pdfAuthor preprint2.26 MBView/Open

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.