The theory & blueprint of quantum supremacy in near-term devices is proposed
Google publishes a paper that outlines theory performing a beyond classical computation by sampling random circuits. Original theory is developed into an experimental blueprint using 9 qubits.
Google open sources Cirq
Google releases Cirq, a python library for writing, manipulating, and running quantum circuits on quantum computers and simulators, in order to improve the productivity of NISQ algorithm developers and researchers.
Google becomes 1st to demonstrate beyond classical computation with a quantum computer
The Sycamore processor performs a target computation in 200 seconds that would be impractical with algorithms and supercomputers available at the time (blog).