Abstract: The entanglement properties of photon and atom within semiconductor resonance cavity were chosen as qubits, atom state was transformed to photon state through electrodynamics system of semiconductor resonance cavity, according to the operation characteristics of semiconductor resonance cavity, judgment conditions of weak and strong coupling of atom and photon in semiconductor resonance judgment were proposed, also the quantum state of atom was manipulated by utilizing external electromagnetic field, the operation of quantum logical gate was thereby completed, then the qubits were expanded though the entanglement among each cavity quantum electrodynamics (CQED) system, realized the quantum computing and networking. Introduced various models such like micro disc resonance cavity, single quantum dot, so forth, which would benefit turning the conception of quantum computing and communicating into the development and manufacturing of semiconductor quantum devices.

Key words: quantum optics； semiconductor cavity；cavity quantum electrodynamics（CQED）; coupling strength；quantum dot ;micro- dish cavity