Macroscopic quantum mechanics
The ability of macroscopic devices to display quantum behaviour offers the possibility of mass fabrication of the components needed for a quantum computer. This quantum interference pattern was generated when a micron-sized superconducting quantum bit (qubit) was exposed to two short microwave pulses separated by a short time delay. The microwaves are able to drive transitions between the two quantum states that make up the qubit. The x-axis is the delay between the pulses, while the y-axis is the microwave frequency. This experiment was performed by the present author's group at Delft.