Patent ID: 8488232

Claim:
An operating method for stimulated Raman adiabatic passage to change probability amplitude of a state |0> and a state |1> used for qubits in a three-level system X including three states of |0>, |1> and |e> in ascending order of energy levels, comprising: directing a first laser beam and a second laser beam at system X which have frequencies in the vicinity of resonance frequencies corresponding to an energy difference between |0> and |e> and an energy difference between |1> and |e>, respectively; and changing temporally two-photon detuning (ΔP−Δ S ) to be a difference between first detuning (Δ P ) and second detuning (Δ S ), the first detuning (Δ P ) being a difference between a first energy difference and a frequency of the first laser beam, the first energy difference being a difference between energy of |0> and energy of |e>, the second detuning (Δs) being a difference between a second energy difference and a frequency of the second laser beam, the second energy difference being a difference between energy of |1> and energy of |e>.