Fig. 4: Dynamic reconfigurability for hybrid analogue–digital quantum simulation.
From: A quantum processor based on coherent transport of entangled atom arrays
a, Hybrid quantum circuit combining coherent atom transport with analogue Hamiltonian evolution and digital quantum gates. b, Measuring entanglement entropy in a many-body Rydberg system via two-copy interferometry. c, Measured half-chain Renyi entanglement entropy after many-body dynamics following quenches on two eight-atom systems. Quenching from |gggg...⟩ (|g⟩ ≡ |1⟩) results in rapid entropy growth and saturation, signifying quantum thermalization. Quenching from |rgrg...⟩ reveals a significantly slower growth of entanglement entropy. d, Measuring the mutual information at 0.5-μs quench time reveals a volume-law scaling for the thermalizing |gggg...⟩ state, and an area-law scaling for the scarring |rgrg...⟩ state. e, The single-site Renyi entropies for sites in the middle of the chain quickly increase and saturate for the |gggg...⟩ quench, but show large oscillations for the |rgrg...⟩ quench. The solid curves are results of exact numerical simulations for the isolated quantum system under HRyd with no free parameters (see Methods for details of data processing). Error bars represent one standard deviation.
