Breakthrough Discoveries in Quantum Physics Challenge Fundamental Assumptions

Scientists have demonstrated the existence of a universal lower bound on topological entanglement entropy (TEE), which is always non-negative. TEE is a measure that provides insights into emergent non-local phenomena and entanglement in quantum systems with topological properties. The researchers found that TEE remains non-negative even when perturbations are introduced by constant-depth circuits. This discovery has practical implications for identifying a material's underlying phase and may aid in quantum computing and the preparation of quantum states. Further research is needed to explore the impact of noise on spurious TEE and the behavior of TEE at finite temperatures.