Berry Phase Estimation: Why It Remains Computationally Hard - Archyworldys

Berry Phase Estimation: Why It Remains Computationally Hard - Archyworldys

When the energy gap between states is sufficiently small, deciding whether a Berry phase equals zero or pi carries the same computational difficulty as any task solved in polynomial time on a quantum computer. Researchers at the Graduate School of Engineering Science, alongside colleagues at Kyoto University, have shown that computing quantized topological invariants unlocks ...