14-qubit entanglement: creation and coherence

14-qubit entanglement: creation and coherence

We report the creation of Greenberger-Horne-Zeilinger states with up to 14 qubits. By investigating the coherence of up to 8 ions over time, we observe a decay proportional to the square of the number of qubits. The observed decay agrees with a theoretical model which assumes a system affected by co...

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Veröffentlicht in:arXiv.org 2011-03
Hauptverfasser: Monz, Thomas, Schindler, Philipp, Barreiro, Julio T, Chwalla, Michael, Nigg, Daniel, Coish, William A, Harlander, Maximilian, Haensel, Wolfgang, Hennrich, Markus, Blatt, Rainer
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Coherence
Decay
Physics - Quantum Physics
Quantum entanglement
Qubits (quantum computing)
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container_title arXiv.org
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creator Monz, Thomas
Schindler, Philipp
Barreiro, Julio T
Chwalla, Michael
Nigg, Daniel
Coish, William A
Harlander, Maximilian
Haensel, Wolfgang
Hennrich, Markus
Blatt, Rainer
description We report the creation of Greenberger-Horne-Zeilinger states with up to 14 qubits. By investigating the coherence of up to 8 ions over time, we observe a decay proportional to the square of the number of qubits. The observed decay agrees with a theoretical model which assumes a system affected by correlated, Gaussian phase noise. This model holds for the majority of current experimental systems developed towards quantum computation and quantum metrology.
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subjects Coherence
Decay
Physics - Quantum Physics
Quantum entanglement
Qubits (quantum computing)
title 14-qubit entanglement: creation and coherence
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