Quantum computation by pairing trapped ultracold ions

Superpositional wavefunction oscillations for the implementation of quantum algorithms modify the desired interference required for the quantum comput ation. We propose a scheme with trapped ultracold ion-pairs being qubits to diminish the detrimental effect of the wavefunction oscillations, which is applied to the two-qubit Grover's search. It can be also found that the qu bits in our scheme are more robust against the decoherence caused by the en vironment, and the model is scalable.