Temporal Dynamical Quantum Phase Transition in Dicke Model with Trapped Ions

Quantum Physics arXiv:2606.28664 (quant-ph) [Submitted on 27 Jun 2026] Title:Temporal Dynamical Quantum Phase Transition in Dicke Model with Trapped Ions Authors:Ji Bian, Wei Wu, Zihan Xie, Mengxiang Zhang, Yi Li, Yue Li, Rixin Yao, Yuqi Zhou, Xu Cheng, Han Pu, Yiheng Lin View a PDF of the paper titled Temporal Dynamical Quantum Phase Transition in Dicke Model with Trapped Ions, by Ji Bian and 10 other authors View PDF HTML (experimental) Abstract:Temporal non-analyticities in the rate function of the Loschmidt echo manifests a class of dynamical quantum phase transitions (DQPTs) that has emerged as a powerful framework for understanding far-from-equilibrium many-body dynamics. While such DQPT has been extensively studied theoretically in spin-boson systems such as the Dicke model, their experimental observation remains elusive. In particular, the dynamics of DQPT in asymmetric spin subspaces and under the influence of spin dissipation are largely unexplored. Here, we report an experimental study of temporal DQPT in a generalized Dicke model using a trapped-ion quantum simulator. By coupling a linear chain of $\rm{^{40}Ca^{+}}$ ions to a collective center-of-mass motional mode, we probe the quench dynamics starting from both symmetric and asymmetric initial states. We extract the rate function and identify temporal turn-around points that are in quantitative agreement with theoretical predictions. Additionally, we investigate the impact of spin dissipation on these dynamics. Our results establish an experimental platform for probing complex many-body out-of-equilibrium phenomena and advance the development of hybrid oscillator-spin quantum simulators. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2606.28664 [quant-ph] (or arXiv:2606.28664v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2606.28664 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Yiheng Lin [view email] [v1] Sat, 27 Jun 2026 00:51:01 UTC (1,945 KB) Full-text links: Access Paper: View a PDF of the paper titled Temporal Dynamical Quantum Phase Transition in Dicke Model with Trapped Ions, by Ji Bian and 10 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-06 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)