Issue |
Europhys. Lett.
Volume 73, Number 4, February 2006
|
|
---|---|---|
Page(s) | 485 - 491 | |
Section | General | |
DOI | https://doi.org/10.1209/epl/i2005-10424-4 | |
Published online | 06 January 2006 |
Arbitrary-speed quantum gates within large ion crystals through minimum control of laser beams
FOCUS center and MCTP, Department of Physics, University of Michigan Ann Arbor, MI 48109, USA
Received:
10
November
2005
Accepted:
15
December
2005
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.
PACS: 03.67.Lx – Quantum computation / 03.67.Pp – Quantum error correction and other methods for protection against decoherence / 32.80.Qk – Coherent control of atomic interactions with photons
© EDP Sciences, 2006
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