Quantum mechanics

Engineering

Graphene

Graphene nanoribbons

Transverse plane

Laser

Physics

Ballistic conduction

Optics

Superconductivity

Cooper pair

Beam splitter

Condensed matter physics

Splitter

Structural engineering

Electron

Physical Review Letters

We report an experimental study of a Cooper pair splitter based on ballistic graphene multiterminal junctions. In a two transverse junction geometry, namely the superconductor-graphene-superconductor and the normal metal-graphene-normal metal, we observe clear signatures of Cooper pair splitting in the local as well as nonlocal electronic transport measurements. Our experimental data can be very well described by our beam splitter model. These results open up possibilities to design new entangled state detection experiments using ballistic Cooper pair splitters.

Ballistic Graphene Cooper Pair Splitter