There have been a lot of announcements recently regarding new chips or new simulators that contain a record number of qubits. We thought it would be useful to our readers to compile all the information into one handy table that you can see below. Note that the data shown for the hardware items are for physical qubits without any error correction.
As we see more announcements in the coming months, you should remember that not all qubits are created equal. A design that has qubits with long coherence times, high gate fidelities, and large connectivities may provide far better results than one that has many more qubits without these characteristics. Please refer to our Qubit Quality page for some data that compares various quality measures for a few different implementations.
The table below was compiled from publicly available sources as of the date listed at the bottom of this page. Please let us know at firstname.lastname@example.org if you see any corrections that are needed or new entries to add.
|IQOQI/Univ. Ulm/Univ. Innsbruck||Gate||Ion Trap||20||TBD|
|NSF STAQ Project||Gate||Ion Trap||N/A||≥64|
|Silicon Quantum Computing||Gate||Spin||N/A||10|
|Univ. of Wisconsin||Gate||Neutral Atoms||49||TBD|
|Harvard/MIT||Quantum Simulator||Rydberg Atoms||51||TBD|
|Univ. of Maryland / NIST||Quantum Simulator||Ion Trap||53||TBD|
|iARPA QEO Research Program||Annealing||Superconducting||N/A||100|
|NTT/Univ. of Tokyo/Japan NII||Qtm Neural Network||Photonic||2048||>20,000|
Updated September 18, 2019