The energy level of electrons can be represented as floors of a hotel occupied by electrons. In the case of the 'Silicon Hotel', shown on the computer screen, there are several rooms available in each floor, meaning that electrons rich with data on the top floors can easily exchange their energy and data with electron on the lower floors. The more of these interactions the material has, the shorter the lifespan for data storage. Instead, the 'Ideal Hotel' does not have any rooms available upstairs, electrons cannot interact with each other, neither swap rooms. Eventually, there would be some exchanges, but it would take a very long time. A material with this type of energy levels would store information for much longer than the current silicon-based devices.