14-Qubit Entanglement: Creation and Coherence
Abstract
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2011
- DOI:
- 10.1103/PhysRevLett.106.130506
- arXiv:
- arXiv:1009.6126
- Bibcode:
- 2011PhRvL.106m0506M
- Keywords:
-
- 03.67.Mn;
- 03.65.Ud;
- 32.80.Qk;
- 37.10.Ty;
- Entanglement production characterization and manipulation;
- Entanglement and quantum nonlocality;
- Coherent control of atomic interactions with photons;
- Ion trapping;
- Quantum Physics
- E-Print:
- 4 pages, 2 figures, 1 table