“Universal Features in the Collective Behavior of Open Quantum Systems”
When many particles share a common environment, dissipation and fluctuations become resources for emergent and complex behavior. In this talk, I will discuss how macroscopic quantum coherence arises due to correlated decay in open quantum systems. I will begin by presenting an overview of our research over the past few years, starting with our early work on Dicke superradiance in extended systems [1,2]—a decades-long open problem in many-body quantum optics. Our theoretical predictions have recently been experimentally validated through the observation of superradiance in atomic arrays.
Building upon this foundation, I will introduce our recent discovery of universal scaling laws for correlated decay that apply broadly to a large class of Markovian quantum systems [3]. These scaling laws open new directions for fault-tolerant quantum computing, precision metrology, and the understanding of out-of-equilibrium phase transitions. Finally, I will present experimentally-relevant examples where many-body decay offers new ways to control and manipulate open quantum systems.
[1] S. J. Masson, A. Asenjo-Garcia, Nat. Commun. 13, 2285 (2022)
[2] S. Cardenas-Lopez, S. J. Masson, Z. Zager, A. Asenjo-Garcia, PRL 131, 033605 (2023)
[3] W.-K. Mok, A. Poddar, E. Sierra, C. C. Rusconi, J. Preskill, A. Asenjo-Garcia, arXiv:2406.00722 (2024)
Host: Jack Harris