Cover Image, Volume 115, Issue 19

Distillation of pure substances from mixtures is a fundamental technique in chemistry. In analogy, higher fidelity quantum states can be distilled from many copies of low fidelity quantum states. The illustration imagines this distillation as a physical process. An example quantum circuit for magic state distillation is portrayed in the background. Mapping a quantum chemistry problem to a quantum computer involves the implementation of precise qubit rotations. The process of building precise rotations from noisy components requires fault‐tolerant procedures. On page 1296 (DOI: 10.1002/qua.24856 ), Kenneth Brown and Colin Trout review how to achieve robust rotations by means of gate compilation and magic‐state distillation.