Entanglement of trapped-ion clock states

Journal Article · Thu Dec 15 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.72.0· OSTI ID:20786279

Haljan, P C; Lee, P J; Brickman, K-A; Acton, M; Deslauriers, L; Monroe, C ^[1]

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1. FOCUS Center and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)

A Moelmer-Soerensen entangling gate is realized for pairs of trapped {sup 111}Cd{sup +} ions using magnetic-field insensitive 'clock' states and an implementation offering reduced sensitivity to optical phase drifts. The gate is used to generate the complete set of four entangled states, which are reconstructed and evaluated with quantum-state tomography. An average target-state fidelity of 0.79 is achieved, limited by available laser power and technical noise. The tomographic reconstruction of entangled states demonstrates universal quantum control of two ion qubits, which through multiplexing can provide a route to scalable architectures for trapped-ion quantum computing.

• OSTI ID: 20786279
• Journal Information: Physical Review. A, Vol. 72, Issue 6; Other Information: DOI: 10.1103/PhysRevA.72.062316; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CADMIUM 111
CATIONS
ENERGY LEVELS
INFORMATION THEORY
LASER RADIATION
MAGNETIC FIELDS
NOISE
OPTICS
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUBITS
RADIATION PRESSURE
SENSITIVITY
TOMOGRAPHY
TRAPPING