DQI Thesis Award Session: Many-body quantum information dynamics

Tremendous advances in quantum technologies have raised fundamental questions: How can we benchmark large and complex quantum experiments? What new physical phenomena can they reveal? And how can we harness these capabilities to better probe the world around us? In this talk, I will draw on my Ph.D. research to show that the dynamics of quantum information provide a unifying lens for addressing these questions. First, I will introduce a simple framework based on quantum information dynamics to describe the propagation of noise in quantum simulators. This framework characterizes the fidelity of mirror circuits and explains a long line of nuclear magnetic resonance experiments on the Loschmidt echo. Second, I will show how the same underlying physics gives rise to an intrinsically many-body generalization of quantum teleportation. Among other features, this teleportation provides an experimental probe for determining whether a quantum Hamiltonian has a gravitational dual. Third, I will demonstrate how insights from information dynamics enable significantly improved protocols for quantum-enhanced sensing and Hamiltonian learning. I will conclude by looking forward and discuss recent developments and future directions in many-body quantum information dynamics.

*Ph.D., Physics, University of California, Berkeley, supervised by Norman Y. Yao.