Phys.org April 6, 2022
A team of researchers in the US (Princeton University, Sandia National Laboratory) used a two qubits silicon device and forced them to interact. The spin state of each electron can be used as a qubit and the interaction between the electrons can entangle these qubits. To do this they constructed a cage in the form of a wafer-thin semiconductor made primarily out of silicon. At the top of the cage they patterned little electrodes, which create the electrostatic potential used to corral the electron. Two of these cages put together, separated by a barrier, or gate, constituted the double quantum dot. By adjusting the voltage on these gates, they pushed the electrons together and caused them to interact resulting in a two-qubit gate. The researchers were able to perform the two-qubit interaction with a fidelity exceeding 99 percent. The work paves the way for the use of silicon-based technologies in quantum computing and accelerate the use of silicon technology as a viable alternative to other quantum computing technologies…read more. Open Access TECHNICAL ARTICLEÂ
High-fidelity operation of a two-qubit quantum processor. Credit: SCIENCE ADVANCES, 6 Apr 2022, Vol 8, Issue 14Â