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Detection of spin entanglement via spin-charge separation in crossed Tomonaga-Luttinger liquids

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Braunecker_2014_PRL_Detection.pdf (372.5Kb)
Date
31/12/2014
Author
Schroer, Alexander
Braunecker, Bernd
Levy Yeyati, Alfredo
Recher, Patrik
Keywords
QC Physics
BDC
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Abstract
We investigate tunneling between two spinful Tomonaga-Luttinger liquids (TLLs) realized, e.g., as two crossed nanowires or quantum Hall edge states. When injecting into each TLL one electron of opposite spin, the dc current measured after the crossing differs for singlet, triplet, or product states. This is a striking new non-Fermi liquid feature because the (mean) current in a noninteracting beam splitter is insensitive to spin entanglement. It can be understood in terms of collective excitations subject to spin-charge separation. This behavior may offer an easier alternative to traditional entanglement detection schemes based on current noise, which we show to be suppressed by the interactions.
Citation
Schroer , A , Braunecker , B , Levy Yeyati , A & Recher , P 2014 , ' Detection of spin entanglement via spin-charge separation in crossed Tomonaga-Luttinger liquids ' , Physical Review Letters , vol. 113 , no. 26 , 266401 . https://doi.org/10.1103/PhysRevLett.113.266401
Publication
Physical Review Letters
Status
Peer reviewed
DOI
https://doi.org/10.1103/PhysRevLett.113.266401
ISSN
0031-9007
Type
Journal article
Rights
© 2014 American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at http://doi.org/10.1103/PhysRevLett.113.266401
Description
The authors acknowledge the support by the EU-FP7 project “Source of Entangled Electrons in Nano Devices” (SE2ND), No. 271554, the DFG Grant No. RE 2978/1-1 (P.R.), and Spanish MINECO through Grant No. FIS2011-26156 (A.L.Y.).
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  • University of St Andrews Research
URL
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.266401#supplemental
URI
http://hdl.handle.net/10023/5990

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