NIST researchers have developed a new quantum computing technique using two different types of ions – magnesium and beryllium – to perform logic operations. This hybrid approach could be advantageous for large-scale quantum computers and networks.
The team entangled the two ions using laser beams and performed two types of logic operations – a controlled NOT (CNOT) gate and a SWAP gate. The different response of the ions to light allows manipulation of one without affecting the other, minimizing interference.
This mixed-atom design provides a universal set of quantum gates, meeting one of the DiVincenzo criteria for building a practical quantum computer. The technique could also improve quantum simulations and measurements.
The research was supported by the Office of the Director of National Intelligence, Intelligence Advanced Research Projects Activity, and the Office of Naval Research.
Keywords: quantum, computers, ions, gates, entanglement
