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Arbitrary-speed quantum gates within large ion crystals through minimum control of laser beams

Shi-Liang Zhu·C. Monroe·L. -M. Duan
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Abstract

We propose a scheme to implement arbitrary-speed quantum entangling gates on two trapped ions immersed in a large linear crystal of ions, with minimal control of laser beams. For gate speeds slower than the oscillation frequencies in the trap, a single appropriately-detuned laser pulse is sufficient for high-fidelity gates. For gate speeds comparable to or faster than the local ion oscillation frequency, we discover a five-pulse protocol that exploits only the local phonon modes. This points to a method for efficiently scaling the ion trap quantum computer without shuttling ions.

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Shi-Liang Zhu, C. Monroe, L. -M. Duan. 2005-08-03. Arbitrary-speed quantum gates within large ion crystals through minimum control of laser beams. https://doi.org/10.1209/epl%2Fi2005-10424-4

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