The human brain actively keeps "learning" in balance by holding on to what matters and letting go of what does not. Researchers in Korea have now reproduced this ability in a semiconductor device, using the color of light to strengthen (remember) or weaken (forget) an artificial synapse's memory. Remarkably, the key ingredient is a material "defect" that engineers usually try to eliminate. The study appears in Nature Communications.
Artificial synapse uses light-color programming for brain-like balanced learning
