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Quantum Information Processing
Erschienen in: Quantum Information Processing 3/2017

01.03.2017

Transferring multiqubit entanglement onto memory qubits in a decoherence-free subspace

verfasst von: Xiao-Ling He, Chui-Ping Yang

Erschienen in: Quantum Information Processing | Ausgabe 3/2017

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Abstract

Different from the previous works on generating entangled states, this work is focused on how to transfer the prepared entangled states onto memory qubits for protecting them against decoherence. We here consider a physical system consisting of n operation qubits and 2n memory qubits placed in a cavity or coupled to a resonator. A method is presented for transferring n-qubit Greenberger–Horne–Zeilinger (GHZ) entangled states from the operation qubits (i.e., information processing cells) onto the memory qubits (i.e., information memory elements with long decoherence time). The transferred GHZ states are encoded in a decoherence-free subspace against collective dephasing and thus can be immune from decoherence induced by a dephasing environment. In addition, the state transfer procedure has nothing to do with the number of qubits, the operation time does not increase with the number of qubits, and no measurement is needed for the state transfer. This proposal can be applied to a wide range of hybrid qubits such as natural atoms and artificial atoms (e.g., various solid-state qubits).
Vorheriger Artikel A class of constacyclic BCH codes and new quantum codes
Nächster Artikel Evolution prediction from tomography

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Metadaten
Titel
Transferring multiqubit entanglement onto memory qubits in a decoherence-free subspace
verfasst von
Xiao-Ling He
Chui-Ping Yang
Publikationsdatum
01.03.2017
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 3/2017
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-017-1523-0

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