Uncovering Emergent Spacetime Supersymmetry with Rydberg Atom Arrays

In the zoo of emergent symmetries in quantum many-body physics, the previously unrealized emergent spacetime supersymmetry (SUSY) is particularly intriguing. Although it was known that spacetime SUSY could emerge at the (1+1)d tricritical Ising transition, an experimental realization is still absent. In this letter, we propose to realize the tricritical Ising transition with Rydberg atom arrays, taking advantage of the reconfigurability of these systems. In such systems, the spacetime SUSY manifests itself in the respective correlation functions of a bosonic mode and its fermionic partner. However, the correlation function of the fermionic mode inevitably involves a string operator, making direct measurement challenging in the conventional setting. Here, we utilize the analog--digital hybrid nature of the Rydberg atom arrays, which can simulate a physical Hamiltonian and perform a digital quantum circuit on the same platform, to measure the correlation function of the fermionic mode. This hybridized protocol provides an experimentally feasible way to reveal the hidden structure of the spacetime SUSY that emerges at the tricritical Ising transition.