  We propose a method to efficiently generate cluster states in charge qubits,
both semiconducting and superconducting, as well as flux qubits. We show that
highly-entangled cluster states can be realized by a `one-touch' entanglement
operation by tuning gate bias voltages for charge qubits. We also investigate
the robustness of these cluster states for non-uniform qubits, which are
unavoidable in solid-state systems. We find that quantum computation based on
cluster states is a promising approach for solid-state qubits.

Strongly Correlated Electrons;Mesoscale and Nanoscale Physics