This integrated quantum computing system is housed in an airtight borosilicate glass cube that maintains a controlled physical environment.[2][4] Each face of the cube is 9 feet (2.7 m) wide and tall.[2] A cylindrical protrusion from the center of the ceiling is a dilution refrigerator, containing a 20-qubittransmon quantum processor.[1][5] It was tested for the first time in the summer of 2018, for two weeks, in Milan, Italy.
From April 6 to May 31, 2019, the Boston Museum of Science hosted an exhibit featuring a replica of the IBM Quantum System One.[8][9]
On June 15, 2021, IBM deployed the first unit of Quantum System One in Germany at its headquarters in Ehningen.[10]