Control and Measurement of Three-Qubit Entangled States

Autor:	Hartmut Häffner, Ferdinand Schmidt-Kaler, G.P.T. Lancaster, Rainer Blatt, Christian F. Roos, M. Riebe, W. Hänsel, Christoph Becher, J. Benhelm
Rok vydání:	2004
Předmět:	Physics Computer Science::Emerging Technologies Multidisciplinary Greenberger–Horne–Zeilinger state Quantum mechanics Qubit Cluster state Quantum Physics Quantum entanglement State (functional analysis) W state Multipartite entanglement Quantum computer
Zdroj:	Science. 304:1478-1480
ISSN:	1095-9203 0036-8075
DOI:	10.1126/science.1097522
Popis:	We report the deterministic creation of maximally entangled three-qubit states—specifically the Greenberger-Horne-Zeilinger (GHZ) state and the W state—with a trapped-ion quantum computer. We read out one of the qubits selectively and show how GHZ and W states are affected by this local measurement. Additionally, we demonstrate conditional operations controlled by the results from reading out one qubit. Tripartite entanglement is deterministically transformed into bipartite entanglement by local operations only. These operations are the measurement of one qubit of a GHZ state in a rotated basis and, conditioned on this measurement result, the application of single-qubit rotations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dcd98d40f1ac45e7ddb0f83b42695fad https://doi.org/10.1126/science.1097522 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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