Entanglement of trapped-ion clock states
- 9 December 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 72 (6), 062316
- https://doi.org/10.1103/physreva.72.062316
Abstract
A Mølmer-Sørensen entangling gate is realized for pairs of trapped 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.
Keywords
This publication has 38 references indexed in Scilit:
- Spin-Dependent Forces on Trapped Ions for Phase-Stable Quantum Gates and Entangled States of Spin and MotionPhysical Review Letters, 2005
- Zero-point cooling and low heating of trappedionsPhysical Review A, 2004
- Bell States of Atoms with Ultralong Lifetimes and Their Tomographic State AnalysisPhysical Review Letters, 2004
- Experimental demonstration of a robust, high-fidelity geometric two ion-qubit phase gateNature, 2003
- Architecture for a large-scale ion-trap quantum computerNature, 2002
- Computable measure of entanglementPhysical Review A, 2002
- Mesoscopic Superpositions of Vibronic Collective States ofTrapped IonsPhysical Review Letters, 2001
- Entanglement and quantum computation with ions in thermal motionPhysical Review A, 2000
- A comparison of entanglement measuresJournal of Modern Optics, 1999
- Experimental issues in coherent quantum-state manipulation of trapped atomic ionsJournal of Research of the National Institute of Standards and Technology, 1998