Gadolinium Gallium Garnet Quantum Electronic Processors (GGGQEP)

Gadolinium Gallium Garnet (GGG, Gd3Ga5O12) Quantum Electronic Processors (QEP) are a hypothetical electronic circuit that operates by stimulation of quantized radiation through the medium of a gadolinium gallium garnet, a synthetic crystal. It was reported to be a data storage method by unknown persons, though there has been no public demonstration of such technology to date.

In the development of computer memory during the 1960s and 1970s, gadolinium gallium garnets were used as a non-magnetic substrate for growing a thin magnetic garnet crystal film used in the fashioning of bubble memory chips, but this technology was surpassed in performance by semiconductor memory chips and development was subsequently abandoned by manufacturers.