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Alonso J, Leupold FM, Solèr ZU, et al. Generation of large coherent states by bang-bang control of a trapped-ion oscillator. Nat Commun. 2016;7:11243doi: 10.1038/ncomms11243.
Alonso, J., Leupold, F. M., Solèr, Z. U., Fadel, M., Marinelli, M., Keitch, B. C., Negnevitsky, V., & Home, J. P. (2016). Generation of large coherent states by bang-bang control of a trapped-ion oscillator. Nature communications, 711243. https://doi.org/10.1038/ncomms11243
Alonso, J, et al. "Generation of large coherent states by bang-bang control of a trapped-ion oscillator." Nature communications vol. 7 (2016): 11243. doi: https://doi.org/10.1038/ncomms11243
Alonso J, Leupold FM, Solèr ZU, Fadel M, Marinelli M, Keitch BC, Negnevitsky V, Home JP. Generation of large coherent states by bang-bang control of a trapped-ion oscillator. Nat Commun. 2016 Apr 05;7:11243. doi: 10.1038/ncomms11243. PMID: 27046513; PMCID: PMC4822070.
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Nat Commun. 2016 Apr 05;7:11243. doi: 10.1038/ncomms11243.

Generation of large coherent states by bang-bang control of a trapped-ion oscillator.

Nature communications

J Alonso, F M Leupold, Z U Solèr, M Fadel, M Marinelli, B C Keitch, V Negnevitsky, J P Home

Affiliations

  1. Institute for Quantum Electronics, ETH Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland.

PMID: 27046513 PMCID: PMC4822070 DOI: 10.1038/ncomms11243

Abstract

Fast control of quantum systems is essential to make use of quantum properties before they degrade by decoherence. This is important for quantum-enhanced information processing, as well as for pushing quantum systems towards the boundary between quantum and classical physics. 'Bang-bang' control attains the ultimate speed limit by making large changes to control fields much faster than the system can respond, but is often challenging to implement experimentally. Here we demonstrate bang-bang control of a trapped-ion oscillator using nanosecond switching of the trapping potentials. We perform controlled displacements with which we realize coherent states with up to 10,000 quanta of energy. We use these displaced states to verify the form of the ion-light interaction at high excitations far outside the usual regime of operation. These methods provide new possibilities for quantum-state manipulation and generation, alongside the potential for a significant increase in operational clock speed for trapped-ion quantum information processing.

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