Entanglement purification with the exchange interaction


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AUER, Adrian, Guido BURKARD, 2014. Entanglement purification with the exchange interaction. In: Physical Review A. 90(2), 022320. ISSN 0556-2791. eISSN 1094-1622

@article{Auer2014Entan-29132, title={Entanglement purification with the exchange interaction}, year={2014}, doi={10.1103/PhysRevA.90.022320}, number={2}, volume={90}, issn={0556-2791}, journal={Physical Review A}, author={Auer, Adrian and Burkard, Guido}, note={Article Number: 022320} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/29132"> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/29132"/> <dc:contributor>Burkard, Guido</dc:contributor> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2014-10-16T11:27:54Z</dc:date> <dc:creator>Burkard, Guido</dc:creator> <dcterms:issued>2014</dcterms:issued> <dc:creator>Auer, Adrian</dc:creator> <dc:contributor>Auer, Adrian</dc:contributor> <dcterms:title>Entanglement purification with the exchange interaction</dcterms:title> <dc:language>eng</dc:language> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2014-10-16T11:27:54Z</dcterms:available> <dcterms:abstract xml:lang="eng">Entanglement purification allows the creation of qubit pairs of arbitrarily high fidelity with respect to a maximally entangled state, starting from a larger number of low-fidelity pairs. Purification requires quantum memory, a role for which electron spins are well suited. However, using existing recurrence protocols involving symmetric local two-qubit operations for spin qubits turns out to be rather unpractical. We present an efficient purification protocol requiring only a single pulsed Heisenberg- or XY-type exchange interaction between two qubit pairs. In contrast to known protocols, we allow for asymmetric bilateral two-qubit operations where the two communication parties operate differently on their qubits. In the optimal version of our protocol, the local two-qubit interactions in the case of Heisenberg exchange correspond to the √swap gate and its inverse.</dcterms:abstract> </rdf:Description> </rdf:RDF>

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