Architecture for a large-scale ion-trap quantum computer

Among the numerous types of architecture being explored for quantum computers are systems utilizing ion traps, in which quantum bits (qubits) are formed from the electronic states of trapped ions and coupled through the Coulomb interaction. Although the elementary requirements for quantum computatio...

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Bibliographic Details
Published in:Nature (London) 2002-06, Vol.417 (6890), p.709-711
Main Authors: Kielpinski, D, Monroe, C, Wineland, D. J
Format: Article
Language:English
Subjects:
Applied sciences
Computers
Design. Technologies. Operation analysis. Testing
Electronics
Exact sciences and technology
Integrated circuits
Ion transport
Ions
Quantum theory
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
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Summary:Among the numerous types of architecture being explored for quantum computers are systems utilizing ion traps, in which quantum bits (qubits) are formed from the electronic states of trapped ions and coupled through the Coulomb interaction. Although the elementary requirements for quantum computation have been demonstrated in this system, there exist theoretical and technical obstacles to scaling up the approach to large numbers of qubits. Therefore, recent efforts have been concentrated on using quantum communication to link a number of small ion-trap quantum systems. Developing the array-based approach, we show how to achieve massively parallel gate operation in a large-scale quantum computer, based on techniques already demonstrated for manipulating small quantum registers. The use of decoherence-free subspaces significantly reduces decoherence during ion transport, and removes the requirement of clock synchronization between the interaction regions.
ISSN:0028-0836
1476-4687
DOI:10.1038/nature00784