Patent ID: 8797621

Claim:
Atom phase-controlled double rephasing-based quantum memory, the memory comprising: an optical medium having three energy levels including first energy level (| 1 >), second energy level (| 2 >), and third energy level (| 3 >), and configured to receive one or more optical pulses from an optical pulse generation unit, and generate output light that satisfies phase matching conditions; and the optical pulse generation unit configured to generate at least five optical pulses that resonate among the energy levels of the optical medium, wherein the optical medium is further configured to generate the output light having π phase shift by using first and second phase control pulses having π-pulse, shift the π phase shift of the output light into 2π phase shift by using a rephasing pulse 1 providing phase gain π, and generate final output light having emission characteristic by shifting the 2π phase shift of the output light to 3π phase shift by using a rephasing pulse 2 providing phase gain π.