Grover search with pairs of trapped ions - art. no. 052308

The desired interference required for quantum computing may be modified by wave-function oscillations for the implementation of quantum algorithms [Ph ys. Rev. Lett. 84 1615 (2000)]. To diminish such a detrimental effect, we p ropose a scheme with trapped ion pairs as qubits and apply the scheme to th e Grover search. It will be shown that our scheme cannot only carry out a f ull Grover search, but can also meet the requirement for scalable hot-ion q uantum computing. Moreover, the ion-pair qubits in our scheme are more robu st against decoherence and the dissipation caused by the environment than s ingle-particle qubits proposed before.