  We propose a experimentally feasible scheme to demonstrate the geometric
phase in flux qubits by means of detuning coherent microwave pulse techniques.
Through measuring the probability of the persistent current state in flux
qubits, one can detect the Berry phase that is acquired with system's
Hamiltonian adiabatical circular evolution in the parameter space. Furthermore,
we show that one should choose an appropriate amplitude of pulses in an
experiment to obtain high readout resolution when detuning frequency of pulses
is fixed and controlled phase shift gates can be implemented based on the
geometric phases by inductance coupling two flux qubits.
