Realization of the quantum Toffoli gate with trapped ions

Gates acting on more than two qubits are appealing as they can substitute complex sequences of two-qubit gates, thus promising faster execution and higher fidelity. One important multiqubit operation is the quantum Toffoli gate that performs a controlled NOT operation on a target qubit depending on...

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Bibliographic Details
Published in:Physical review letters 2009-01, Vol.102 (4), p.040501-040501, Article 040501
Main Authors: Monz, T, Kim, K, Hänsel, W, Riebe, M, Villar, A S, Schindler, P, Chwalla, M, Hennrich, M, Blatt, R
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONTROL THEORY
DATA PROCESSING
IONS
QUANTUM COMPUTERS
QUANTUM MECHANICS
QUBITS
TRAPPING
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Summary:Gates acting on more than two qubits are appealing as they can substitute complex sequences of two-qubit gates, thus promising faster execution and higher fidelity. One important multiqubit operation is the quantum Toffoli gate that performs a controlled NOT operation on a target qubit depending on the state of two control qubits. Here we present the first experimental realization of the quantum Toffoli gate in an ion trap quantum computer, achieving a mean gate fidelity of 71(3)%. Our implementation is particularly efficient as the relevant logic information is directly encoded in the motion of the ion string.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.102.040501