Quantum well lasers have attracted a great deal of attention by their many advantages such as low threshold current density, excellent temperature feature, high modulation rate and wavelength adjustability etc.

Many non-volatile memories (including types of Flash memory) use floating gate transistors like this one. Like many transistors, it has three important terminals: the source, the drain and the control gate. In a normal (non-floating) transistor applying a voltage on the gate will create a channel between the source and the drain that allows current to flow between the source and drain.

A special type of quantum sensors – quantum accelerometers and quantum gyroscopes – can be combined into quantum autonomous navigation systems. Such a system may enable location tracking without the aid of GPS satellites.