According to the Ministry of Science and Technology official microblogging sharp technology 30th news, the Massachusetts Institute of Technology (MIT) R & D personnel to develop a quantum computing prototype chip can be used to achieve quantum bit ion trap and excitation quantum state laser light path integration Together This achievement is published in the "Nature Nanotechnology" magazine website.
Previously, quantum computing had implemented a system of 12 qubits in the lab, but the usual way to do this was to have complex instrumentation and huge size. Ultimately create a practical quantum computer, the need for miniaturization of quantum computing devices, which is equivalent to the electronic computer replaced by a semiconductor chip vacuum tube process. This MIT achievement represents a significant step forward in quantum computing.
The chip developed by MIT team implements "surface ion trap" on the surface by the embedded electrode. The ion trap is trapped by the electric field at 50 micrometer above the electrode. Each ion trap is only 5 micrometers apart. It has good scalability and can be used in Develop multi-qubit system. More importantly, the team also integrated the laser light path that excites the ion trap's quantum states onto the same chip. The chip uses a quartz substrate, the silicon layer is a layer of silicon nitride light guide layer to control the optical path. Beneath the niobium electrode, a diffraction grating is placed that focuses the laser on the ion trap above the electrode.
Currently, this prototype chip can not modulate the laser intensity that excites each ion trap, and different laser intensities are essential for quantum computing programming. In the future, researchers will continue their efforts in this direction so that quantum information processing chips will come out as soon as possible.
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