2021/12/14 by Bennet Windt, Hannes Pichler · 22 citations
Computer Science · Physics and Astronomy · #Bipartite graph #Cold Atom Physics and Bose-Einstein Condensates #Graph #Hamiltonian (control theory) #Quantum #Quantum Computing Algorithms and Architecture #Quantum many-body systems #Rydberg formula #Scars #Scattering #quant-ph
paper · pdf · doi:10.1103/physrevlett.128.090606
published in Physical Review Letters 128(9), 090606 (American Physical Society) · 12 pages, 6 figures
arxiv created 2021/12/14 · openalex publication_date 2022/03/04 · openalex created_date 2022/03/05 · arxiv updated 2022/03/14 · openalex updated_date 2026/08/05
We develop an analytical approach for the description of quantum many-body scars in PXP models. We show that the scarred dynamics in the PXP model on a complete bipartite graph can be interpreted as a one-dimensional chiral scattering problem, and solve this problem analytically. The insights from this analysis allow us to predict that dynamical signatures of scars in PXP models can be enhanced by spin squeezing the initial states. We show numerically that this stabilization mechanism applies not only to the complete bipartite graph but also to one- and two-dimensional lattices, which are relevant for Rydberg atom array experiments. Moreover, our findings provide a physical motivation for Hamiltonian deformations reminiscent of those known to produce perfect scars.