Spin-dependent forces on trapped ions for phase-stable quantum gates and entangled states of spin and motion.

Favored schemes for trapped-ion quantum logic gates use bichromatic laser fields to couple internal qubit states with external motion through a "spin-dependent force." We introduce a new degree of freedom in this coupling that reduces its sensitivity to phase decoherence. We demonstrate bichromatic spin-dependent forces on a single trapped 111Cd+ ion, and show that phase coherence of the resulting entangled states of spin and motion depends critically upon the spectral arrangement of the optical fields. This applies directly to the operation of entangling gates on multiple ions.

• Publication year

  2004

• Venue

  Physical Review Letters

• Publication date

  2004-11-09

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevLett.94.153602arXiv quant-ph/0411068PMID 15904144
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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