Experimental demonstration of a controlled-NOT wave-packet gate

Details Experimental demonstration of a controlled-NOT wave-packet gate Experimental demonstration of a controlled-NOT wave-packet gate

2002-08-28

arxiv.org/abs/quant-ph/0208180v1

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.89.267901

We report the experimental demonstration of a controlled-NOT (CNOT) quantum logic gate between motional and internal state qubits of a single ion where, as opposed to previously demonstrated gates, the conditional dynamics depends on the extent of the ion's wave-packet. Advantages of this CNOT gate over one demonstrated previously are its immunity from Stark shifts due to off-resonant couplings and the fact that an auxiliary internal level is not required. We characterize the gate logic through measurements of the post-gate ion state populations for both logic basis and superposition input states, and we demonstrate the gate coherence via an interferometric measurement.

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