1. Qubit as microwave amplifier: Qubit is shown to be able to amplify microwave without population inversion.
2. High storage efficient optical quantum memory: Use ultra cold atoms as medium to store the coherent light pulse with high efficiency for retrieving the light pulse. 
3. Highly purified single photon source at room temperature: technique based on semiconductor quantum dots is developed to create highly purified single photons.

"1. Qubit amplifier: using qubit to amplify microwave without involving population inversion.
2. High storage efficiency quantum memory: Using ultra cold atoms, quantum memory is realized with world record of storage efficiency 92storage time to pulse width ratio 1200.
3. Highly purified single photon source: By using an acousto-optic modulator, single photons at room temperature are generat

Qubit amplifier that uses qubits to amplify microwave have potential for the usage to amplify signals performed in quantum computers. Highly purified single photon source at room temperature has great potential for being used for secure communication in either in defensebanking systems. High storage efficient optical quantum memory is still at the stage of academic research. However, the high