Patent ID: 7466725

Claim:
A quantum computer apparatus, comprising: an optical resonator including a physical system group containing a plurality of physical systems each having at least three energy states: a highest-energy state expressed by |3>, and other two energy states expressed by |1> and |2>, and if exist, fourth or more states being expressed by |p>, p being a natural number not less than 4, a transition angular frequency corresponding to a transition between |i> and j> being expressed by ω ij , a homogeneous broadening of a transition between |i> and |j> being expressed by Δω homo,ij , and i and j being natural numbers, the optical resonator having a plurality of resonator modes, an angular frequency of a k th resonator mode included in the resonator modes being expressed by ω ck , k being a natural number; and an emitting unit configured to emit a light beam to the physical system group in the optical resonator, and wherein: a difference between angular frequencies of selected two resonator modes of the resonator modes satisfies |ω cl −ω cm |>Δω homo,23 , where l and m indicate an l th resonator mode and an m th resonator mode included in the resonator modes, respectively; the physical system group includes a plurality of physical system subgroups A q having respective transition angular frequencies ω 23 which resonate with respective angular frequencies ω cq of the resonator modes of the optical resonator, q being a natural number; and the emitting unit is arranged to apply the light beam of two wavelengths and other light beam to an s(1) th quantum bit A qs(1) included in quantum bits A qs formed of r physical systems selected from each of the physical system subgroups A q , r being a natural number, s being natural numbers ranging from l to r, the light beam of the two wavelengths simultaneously causing two-photon resonance on s(1) th quantum bits of the physical system subgroups A q at a transition angular frequency ω 12 or ω lp , the other light beam simultaneously causing one-photon resonance on the s(1) th quantum bits of the physical system subgroups A q at a transition angular frequency ω 13 or ω p3 .