14-Qubit Entanglement: Creation and Coherence

Journal Article · Fri Apr 01 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.130506· OSTI ID:21550248

Monz, Thomas; Schindler, Philipp; Barreiro, Julio T; Chwalla, Michael; Nigg, Daniel; Harlander, Maximilian; Hennrich, Markus ^[1]; Coish, William A ^[2]; Haensel, Wolfgang ^[3]; Blatt, Rainer ^[1]

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1. Institut fuer Experimentalphysik, Universitaet Innsbruck, Technikerstr. 25, A-6020 Innsbruck (Austria)
2. Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, ON, N2L 3G1 (Canada)
3. Institut fuer Quantenoptik und Quanteninformation, Oesterreichische Akademie der Wissenschaften, Otto-Hittmair-Platz 1, A-6020 Innsbruck (Austria)

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.

• OSTI ID: 21550248
• Journal Information: Physical Review Letters, Vol. 106, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.106.130506; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
CURRENTS
DECAY
NOISE
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
QUBITS
COMPUTERS
INFORMATION
QUANTUM INFORMATION