Journal
QUANTUM INFORMATION PROCESSING
Volume 10, Issue 6, Pages 771-792Publisher
SPRINGER
DOI: 10.1007/s11128-011-0296-0
Keywords
Optimal control; Phase gate; Rydberg atoms; Cavity quantum electrodynamics
Funding
- Federal Ministry of Education and Research BMBF
- Ministry of Science and Culture MWK of the Federal State of Baden-Wurttemberg)
- Deutsche Forschungsgemeinschaft [Ko 2301/2]
- German-Israeli Foundation for Scientific Cooperation [982-192.14/2007]
- European Union
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Atom chips are a promising candidate for a scalable architecture for quantum information processing provided a universal set of gates can be implemented with high fidelity. The difficult part in achieving universality is the entangling two-qubit gate. We consider a Rydberg phase gate for two atoms trapped on a chip and employ optimal control theory to find the shortest gate that still yields a reasonable gate error. Our parameters correspond to a situation where the Rydberg blockade regime is not yet reached. We discuss the role of spontaneous emission and the effect of noise from the chip surface on the atoms in the Rydberg state.
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