Scientists found a way to exploit the interaction between the electron and the thousands of nuclei using lasers to 'cool' the nuclei to less than 1 milliKelvin. They then showed they can control and manipulate the thousands of nuclei as if they form a single body in unison, like a second qubit. This proves the nuclei in the quantum dot can exchange information with the electron qubit and can be used to store quantum information as a memory device.