Emergent Randomness from Many-Body Quantum Chaos

In this talk we introduce a new method for generating random quantum state ensembles in an experimentally practical manner, and observe signatures of these ensembles using a Rydberg quantum simulator. Concretely, we find that universal and highly random state ensembles are encoded in a wavefunction resulting from chaotic quantum many-body dynamics; these ensembles can be uncovered when the correlations between complementary subsystems are properly captured. Our results offer both a new approach for studying many-body chaos and quantum thermalization, and an easily-implementable method for sampling quantum states randomly over the Hilbert space; the latter enables quantum platforms with limited spatiotemporal control to realize a variety of previously inaccessible applications, such as device benchmarking.