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Impurity Scattering Induced Entanglement of Ballistic Electrons

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arxiv quant-ph/0109045 v2 pith:M6ND7B6N submitted 2001-09-10 quant-ph

Impurity Scattering Induced Entanglement of Ballistic Electrons

classification quant-ph
keywords entanglementimpurityballisticelectronsgeneratedlocalizedstatebeam
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We show how entanglement between two conduction electrons is generated in the presence of a localized magnetic impurity embedded in an otherwise ballistic conductor of special geometry. This process is a generalization of beam-splitter mediated entanglement generation schemes with a localized spin placed at the site of the beam splitter. Our entangling scheme is unconditional and robust to randomness of the initial state of the impurity. The entangled state generated manifests itself in noise reduction of spin-dependent currents.

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