{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:59:44Z","timestamp":1760144384185,"version":"build-2065373602"},"reference-count":119,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2024,4,14]],"date-time":"2024-04-14T00:00:00Z","timestamp":1713052800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>Recent progress towards understanding the mechanism of dynamical tunneling in Hamiltonian systems with three or more degrees of freedom (DoF) is reviewed. In contrast to systems with two degrees of freedom, the three or more degrees of freedom case presents several challenges. Specifically, in higher-dimensional phase spaces, multiple mechanisms for classical transport have significant implications for the evolution of initial quantum states. In this review, the importance of features on the Arnold web, a signature of systems with three or more DoF, to the mechanism of resonance-assisted tunneling is illustrated using select examples. These examples represent relevant models for phenomena such as intramolecular vibrational energy redistribution in isolated molecules and the dynamics of Bose\u2013Einstein condensates trapped in optical lattices.<\/jats:p>","DOI":"10.3390\/e26040333","type":"journal-article","created":{"date-parts":[[2024,4,15]],"date-time":"2024-04-15T10:24:26Z","timestamp":1713176666000},"page":"333","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Dynamical Tunneling in More than Two Degrees of Freedom"],"prefix":"10.3390","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4424-6745","authenticated-orcid":false,"given":"Srihari","family":"Keshavamurthy","sequence":"first","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology, Kanpur 208016, Uttar Pradesh, India"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"246","DOI":"10.1063\/1.441832","article-title":"Quantum dynamical tunneling in bound states","volume":"75","author":"Davis","year":"1981","journal-title":"J. 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