Issue |
Europhys. Lett.
Volume 65, Number 5, March 2004
|
|
---|---|---|
Page(s) | 587 - 593 | |
Section | General | |
DOI | https://doi.org/10.1209/epl/i2003-10174-3 | |
Published online | 01 February 2004 |
Quantized AC-Stark shifts and their use for multiparticle entanglement and quantum gates
Institut für Experimentalphysik - 6020 Innsbruck, Austria
Received:
5
September
2003
Accepted:
18
December
2003
A single -ion is trapped and laser-cooled to
its motional ground state. Laser radiation which couples
off-resonantly to a motional sideband of the ion's
to
transition causes a phase shift proportional to the
ion's motional quantum state
. As the phase shift is
conditional upon the ion's motion, we are able to demonstrate a
universal 2-qubit quantum gate operation where the electronic
target state
is flipped depending on the motional qubit
state
. Finally, we discuss
scaling properties of this universal quantum gate for linear ion
crystals and present numerical simulations for the generation of a
maximally entangled state of five ions.
PACS: 03.67.Lx – Quantum computation / 03.65.Ud – Entanglement and quantum nonlocality (e.g., EPR paradox, Bell's inequalities, GHZ states, etc.)
© EDP Sciences, 2004
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