Qubits are the basic unit of quantum information and are able to hold far more information than classical bits. This metric quantifies the number of qubits implemented in solid state superconducting quantum computers. We expect that the number of available qubits will grow exponentially in time in the near future. The optimistic assumption is that the number will double every 10 months whereas the less optimistic assumption assumes the number doubles every 20 months. The data points are taken from the following table:
| Number of qubits | Year | Reference |
|---|---|---|
| 2 | 2013 | Córcoles, A.D. (et al.) two_qubit |
| 5 | 2014 | Barends (et al.) at_the_surface |
| 3 | 2014 | Chow (et al.) scalable |
| 5 | 2016 | IBM (2016) ibm_cloud |
| 16 | 2017 | IBM (2017) ibm_bouble |
| 20 | 2017 | Reynolds google |
| 49 | 2018 | Reynolds google |
| 127 | 2021 | IBM (2021) ibm_eagle |
| 433 | 2022 | IBM (2022) ibm_osprey |