How to realize a universal quantum gate with trapped ions

We report the realization of an elementary quantum processor based on a linear crystal of trapped ions. Each ion serves as a quantum bit (qubit) to store the quantum information in long lived electronic states. We present the realization of single-qubit and of universal two-qubit logic gates. The tw...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2003-12, Vol.77 (8), p.789-796
Main Authors: SCHMIDT-KALER, F, HÄFFNER, H, BLATT, R, GULDE, S, RIEBE, M, LANCASTER, G. P. T, DEUSCHLE, T, BECHER, C, HÄNSEL, W, ESCHNER, J, ROOS, C. F
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Atomic properties and interactions with photons
Classical and quantum physics: mechanics and fields
Crystals
Exact sciences and technology
Foundations, theory of measurement, miscellaneous theories (including aharonov-bohm effect, bell inequalities, berry's phase)
Gates
Joining
Lasers
Logic
Microprocessors
Optical cooling of atoms
trapping
Photon interactions with atoms
Physics
Quantum computation
Quantum information
Quantum mechanics
Qubits (quantum computing)
Stores
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Summary:We report the realization of an elementary quantum processor based on a linear crystal of trapped ions. Each ion serves as a quantum bit (qubit) to store the quantum information in long lived electronic states. We present the realization of single-qubit and of universal two-qubit logic gates. The two-qubit operation relies on the coupling of the ions through their collective quantized motion. A detailed description of the setup and the methods is included.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-003-1346-9