Information Scrambling in Bosonic Gaussian Dynamics

Autor:	Mollabashi, Ali, Rahimi-Keshari, Saleh
Rok vydání:	2024
Předmět:	Quantum Physics Condensed Matter - Disordered Systems and Neural Networks Condensed Matter - Statistical Mechanics Condensed Matter - Strongly Correlated Electrons High Energy Physics - Theory
Druh dokumentu:	Working Paper
Popis:	We show that randomness in quadratic bosonic Hamiltonians results in certain information scrambling diagnostics, mirroring those in chaotic systems. Specifically, for initial Gaussian states, we observe the disappearance of the memory effect in the entanglement dynamics of disjoint blocks and the negative values of tripartite mutual information. We also find that the spectral form factor for these integrable systems exhibits a ramp. However, in contrast to chaotic systems, the ramp is nonlinear, and the out-of-time-ordered correlators display power-law growth for certain operators and Gaussian dynamics. These findings indicate that information scrambling driven by randomness is distinct from quantum chaos. Moreover, our results provide insight into the dynamics of Gaussian states in continuous-variable systems, which are useful and available resources for quantum information processing. Comment: 8+5 pages, 4+2 figures, v2: references updated + presentation improved + added discussion about adding vacuum noise
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2408.12089 Zobrazit plný text záznamu View this record from Arxiv