2018

128 qubits, Rigetti, US.

2018

72 qubits, Google, US.

2017

50 qubits, IBM, US.

2017

17 qubits, IBM, US.

2006

12 qubits, Institute for Quantum Computing, Perimeter Institute for Theoretical Physics, and MIT.

2000

7 qubits, Los Alamos National Laboratory, US.

2000

5 qubits, Technical University of Munich, Germany.

1998

2 qubits, IBM, UC Berkeley, Stanford University, and MIT, US.

1998

2 qubits, Oxford University, UK.