Two quantum systems can coordinate their actions perfectly even when they have no memory of what happened before.
Quantum correlations act as a physical substitute for memory in complex decision-making tasks. Classical agents usually require a history of past events to sync their behavior effectively. These systems achieve the same level of cooperation by using entanglement rather than a digital record. This math proves that quantum properties can bypass the need for traditional data storage. Future computers might use these physical links to coordinate massive networks without ever needing to save a single byte of history.
Quantum Coordination without Conditioning under Restricted Information
arXiv · 2604.27173
We study coordination under restricted information, where classical local models fail to implement certain correlated distributions because agents cannot condition on past history. We show that quantum systems overcome this limitation even when using only separable states. Both classically diagonal encodings (shared latent variables) and separable states with noncommuting local structure (quantum discord) enable the implementation of joint distributions that are unattainable by any classical loc