© J. Jost, NIST.
Two beryllium ions, each acting as a quantum bit, are trapped inside a 3.5 mm by 200 micrometer slit in an alumina wafer with gold electrodes. The slit is seen as a narrow dark slit on the left side of the chip. This chip-based quantum computer was produced by David Wineland's group at the National Institute of Standards and Technology (NIST), Colorado. Wineland's team can perform a controlled sequence of 25 one and two-bit operations with the system. (Unit: 7)