Qi Zhao

A quantum computer is like an orchestra where each musician plays their own part. If the conductor slips up, the music falls apart. In digital quantum simulations, the conductor's role is played by a sequence of simple operations, and errors accumulate like wrong notes.

Seven dancers step onto the stage. They join hands so that any trio or quartet moves in perfect harmony with the rest — no group falls out of the overall rhythm. In the quantum world, this is called an absolutely maximally entangled state (AME for short). It's a perfect knot where every part knows everything about the whole.