Quantum Information

How quantum are quantum states?

Even though quantum correlations are a crucial resource for quantnum computing, it is theoretically extremely hard to quantify how quantum different objects are and what precisely it means for computation. In arXiv: 2204.11236 we showed that quantumness of the state is closely related to how the information is spreading in a quantum circuit - which incidentally happens to be easy and scalable to measure! We are interested to use these results to get deeper insights into quantum computational complexity.