Qdev seminar by Amir H. Karamlou, MIT

Analog quantum simulation of many-body systems with superconducting qubits

Many-body quantum systems exhibit rich fundamental physics, however, they are often difficult to study analytically, and computationally intractable to simulate using a classical computer. Superconducting quantum circuits have emerged as promising and well-controlled quantum hardware capable of simulating many-body quantum systems. In this talk, I will discuss using superconducting quantum qubit arrays with 9 and 16 qubits for many-body quantum simulation. We experimentally simulate quantum transport in the presence of varying degrees of localization in a 3x3 tight-binding lattice and use our platform to measure out-of-time-ordered correlators (OTOCs) to observe the propagation of quantum information. In addition, we generate superposition states by simultaneously driving all lattice sites of the 4x4 qubit array and extract correlation lengths and entanglement entropy across its many-body energy spectrum. We observe an onset of area-law entanglement scaling for states near the edges of the spectrum to volume-law scaling at its center.