[{"date_updated":"2023-09-06T15:24:31Z","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","external_id":{"isi":["000495865300001"],"arxiv":["1801.01389"]},"scopus_import":"1","publication_identifier":{"issn":["0001-5962"],"eissn":["1871-2509"]},"article_type":"original","oa_version":"Preprint","year":"2019","volume":222,"publication_status":"published","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1801.01389"}],"oa":1,"date_published":"2019-06-07T00:00:00Z","_id":"7413","abstract":[{"text":"We consider Bose gases consisting of N particles trapped in a box with volume one and interacting through a repulsive potential with scattering length of order N−1 (Gross–Pitaevskii regime). We determine the ground state energy and the low-energy excitation spectrum, up to errors vanishing as N→∞. Our results confirm Bogoliubov’s predictions.","lang":"eng"}],"arxiv":1,"issue":"2","article_processing_charge":"No","language":[{"iso":"eng"}],"doi":"10.4310/acta.2019.v222.n2.a1","day":"07","author":[{"last_name":"Boccato","full_name":"Boccato, Chiara","first_name":"Chiara","id":"342E7E22-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Brennecke","first_name":"Christian","full_name":"Brennecke, Christian"},{"full_name":"Cenatiempo, Serena","first_name":"Serena","last_name":"Cenatiempo"},{"full_name":"Schlein, Benjamin","first_name":"Benjamin","last_name":"Schlein"}],"type":"journal_article","citation":{"ama":"Boccato C, Brennecke C, Cenatiempo S, Schlein B. Bogoliubov theory in the Gross–Pitaevskii limit. <i>Acta Mathematica</i>. 2019;222(2):219-335. doi:<a href=\"https://doi.org/10.4310/acta.2019.v222.n2.a1\">10.4310/acta.2019.v222.n2.a1</a>","apa":"Boccato, C., Brennecke, C., Cenatiempo, S., &#38; Schlein, B. (2019). Bogoliubov theory in the Gross–Pitaevskii limit. <i>Acta Mathematica</i>. International Press of Boston. <a href=\"https://doi.org/10.4310/acta.2019.v222.n2.a1\">https://doi.org/10.4310/acta.2019.v222.n2.a1</a>","short":"C. Boccato, C. Brennecke, S. Cenatiempo, B. Schlein, Acta Mathematica 222 (2019) 219–335.","mla":"Boccato, Chiara, et al. “Bogoliubov Theory in the Gross–Pitaevskii Limit.” <i>Acta Mathematica</i>, vol. 222, no. 2, International Press of Boston, 2019, pp. 219–335, doi:<a href=\"https://doi.org/10.4310/acta.2019.v222.n2.a1\">10.4310/acta.2019.v222.n2.a1</a>.","chicago":"Boccato, Chiara, Christian Brennecke, Serena Cenatiempo, and Benjamin Schlein. “Bogoliubov Theory in the Gross–Pitaevskii Limit.” <i>Acta Mathematica</i>. International Press of Boston, 2019. <a href=\"https://doi.org/10.4310/acta.2019.v222.n2.a1\">https://doi.org/10.4310/acta.2019.v222.n2.a1</a>.","ieee":"C. Boccato, C. Brennecke, S. Cenatiempo, and B. Schlein, “Bogoliubov theory in the Gross–Pitaevskii limit,” <i>Acta Mathematica</i>, vol. 222, no. 2. International Press of Boston, pp. 219–335, 2019.","ista":"Boccato C, Brennecke C, Cenatiempo S, Schlein B. 2019. Bogoliubov theory in the Gross–Pitaevskii limit. Acta Mathematica. 222(2), 219–335."},"title":"Bogoliubov theory in the Gross–Pitaevskii limit","quality_controlled":"1","department":[{"_id":"RoSe"}],"publication":"Acta Mathematica","status":"public","intvolume":"       222","publisher":"International Press of Boston","isi":1,"month":"06","date_created":"2020-01-30T09:30:41Z","page":"219-335"},{"article_type":"original","day":"28","type":"journal_article","author":[{"last_name":"Bernard","first_name":"Patrick","full_name":"Bernard, Patrick"},{"id":"FE553552-CDE8-11E9-B324-C0EBE5697425","orcid":"0000-0002-6051-2628","last_name":"Kaloshin","full_name":"Kaloshin, Vadim","first_name":"Vadim"},{"last_name":"Zhang","full_name":"Zhang, Ke","first_name":"Ke"}],"year":"2016","oa_version":"None","citation":{"mla":"Bernard, Patrick, et al. “Arnold Diffusion in Arbitrary Degrees of Freedom and Normally Hyperbolic Invariant Cylinders.” <i>Acta Mathematica</i>, vol. 217, no. 1, Institut Mittag-Leffler, 2016, pp. 1–79, doi:<a href=\"https://doi.org/10.1007/s11511-016-0141-5\">10.1007/s11511-016-0141-5</a>.","ista":"Bernard P, Kaloshin V, Zhang K. 2016. Arnold diffusion in arbitrary degrees of freedom and normally hyperbolic invariant cylinders. Acta Mathematica. 217(1), 1–79.","ieee":"P. Bernard, V. Kaloshin, and K. Zhang, “Arnold diffusion in arbitrary degrees of freedom and normally hyperbolic invariant cylinders,” <i>Acta Mathematica</i>, vol. 217, no. 1. Institut Mittag-Leffler, pp. 1–79, 2016.","chicago":"Bernard, Patrick, Vadim Kaloshin, and Ke Zhang. “Arnold Diffusion in Arbitrary Degrees of Freedom and Normally Hyperbolic Invariant Cylinders.” <i>Acta Mathematica</i>. Institut Mittag-Leffler, 2016. <a href=\"https://doi.org/10.1007/s11511-016-0141-5\">https://doi.org/10.1007/s11511-016-0141-5</a>.","apa":"Bernard, P., Kaloshin, V., &#38; Zhang, K. (2016). Arnold diffusion in arbitrary degrees of freedom and normally hyperbolic invariant cylinders. <i>Acta Mathematica</i>. Institut Mittag-Leffler. <a href=\"https://doi.org/10.1007/s11511-016-0141-5\">https://doi.org/10.1007/s11511-016-0141-5</a>","ama":"Bernard P, Kaloshin V, Zhang K. Arnold diffusion in arbitrary degrees of freedom and normally hyperbolic invariant cylinders. <i>Acta Mathematica</i>. 2016;217(1):1-79. doi:<a href=\"https://doi.org/10.1007/s11511-016-0141-5\">10.1007/s11511-016-0141-5</a>","short":"P. Bernard, V. Kaloshin, K. Zhang, Acta Mathematica 217 (2016) 1–79."},"title":"Arnold diffusion in arbitrary degrees of freedom and normally hyperbolic invariant cylinders","language":[{"iso":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2021-01-12T08:19:39Z","publication_identifier":{"issn":["0001-5962"]},"doi":"10.1007/s11511-016-0141-5","month":"09","extern":"1","date_published":"2016-09-28T00:00:00Z","_id":"8494","abstract":[{"lang":"eng","text":"We prove a form of Arnold diffusion in the a-priori stable case. Let\r\nH0(p)+ϵH1(θ,p,t),θ∈Tn,p∈Bn,t∈T=R/T,\r\nbe a nearly integrable system of arbitrary degrees of freedom n⩾2 with a strictly convex H0. We show that for a “generic” ϵH1, there exists an orbit (θ,p) satisfying\r\n∥p(t)−p(0)∥>l(H1)>0,\r\nwhere l(H1) is independent of ϵ. The diffusion orbit travels along a codimension-1 resonance, and the only obstruction to our construction is a finite set of additional resonances.\r\n\r\nFor the proof we use a combination of geometric and variational methods, and manage to adapt tools which have recently been developed in the a-priori unstable case."}],"date_created":"2020-09-18T10:46:07Z","page":"1-79","article_processing_charge":"No","issue":"1","publication":"Acta Mathematica","quality_controlled":"1","status":"public","intvolume":"       217","volume":217,"publisher":"Institut Mittag-Leffler","publication_status":"published"}]