{"abstract":[{"lang":"eng","text":"We show the existence of ground states in the massless spin boson model without any infrared regularization. Our proof is non-perturbative and relies on a compactness argument. It works for arbitrary values of the coupling constant under the hypothesis that the second derivative of the ground state energy as a function of a constant external magnetic field is bounded."}],"date_created":"2023-04-13T18:07:22Z","publication_status":"published","issue":"1","doi":"10.1007/s00220-021-04185-w","page":"419-433","year":"2021","status":"public","intvolume":"       388","author":[{"first_name":"David","full_name":"Hasler, David","last_name":"Hasler"},{"full_name":"Hinrichs, Benjamin","id":"99427","last_name":"Hinrichs","first_name":"Benjamin","orcid":"0000-0001-9074-1205"},{"last_name":"Siebert","full_name":"Siebert, Oliver","first_name":"Oliver"}],"publisher":"Springer Science and Business Media LLC","extern":"1","volume":388,"_id":"43465","title":"On Existence of Ground States in the Spin Boson Model","publication_identifier":{"issn":["0010-3616","1432-0916"]},"external_id":{"arxiv":["2102.13373"]},"user_id":"99427","citation":{"apa":"Hasler, D., Hinrichs, B., &#38; Siebert, O. (2021). On Existence of Ground States in the Spin Boson Model. <i>Communications in Mathematical Physics</i>, <i>388</i>(1), 419–433. <a href=\"https://doi.org/10.1007/s00220-021-04185-w\">https://doi.org/10.1007/s00220-021-04185-w</a>","ama":"Hasler D, Hinrichs B, Siebert O. On Existence of Ground States in the Spin Boson Model. <i>Communications in Mathematical Physics</i>. 2021;388(1):419-433. doi:<a href=\"https://doi.org/10.1007/s00220-021-04185-w\">10.1007/s00220-021-04185-w</a>","mla":"Hasler, David, et al. “On Existence of Ground States in the Spin Boson Model.” <i>Communications in Mathematical Physics</i>, vol. 388, no. 1, Springer Science and Business Media LLC, 2021, pp. 419–33, doi:<a href=\"https://doi.org/10.1007/s00220-021-04185-w\">10.1007/s00220-021-04185-w</a>.","ieee":"D. Hasler, B. Hinrichs, and O. Siebert, “On Existence of Ground States in the Spin Boson Model,” <i>Communications in Mathematical Physics</i>, vol. 388, no. 1, pp. 419–433, 2021, doi: <a href=\"https://doi.org/10.1007/s00220-021-04185-w\">10.1007/s00220-021-04185-w</a>.","short":"D. Hasler, B. Hinrichs, O. Siebert, Communications in Mathematical Physics 388 (2021) 419–433.","chicago":"Hasler, David, Benjamin Hinrichs, and Oliver Siebert. “On Existence of Ground States in the Spin Boson Model.” <i>Communications in Mathematical Physics</i> 388, no. 1 (2021): 419–33. <a href=\"https://doi.org/10.1007/s00220-021-04185-w\">https://doi.org/10.1007/s00220-021-04185-w</a>.","bibtex":"@article{Hasler_Hinrichs_Siebert_2021, title={On Existence of Ground States in the Spin Boson Model}, volume={388}, DOI={<a href=\"https://doi.org/10.1007/s00220-021-04185-w\">10.1007/s00220-021-04185-w</a>}, number={1}, journal={Communications in Mathematical Physics}, publisher={Springer Science and Business Media LLC}, author={Hasler, David and Hinrichs, Benjamin and Siebert, Oliver}, year={2021}, pages={419–433} }"},"language":[{"iso":"eng"}],"date_updated":"2023-04-14T05:03:06Z","type":"journal_article","publication":"Communications in Mathematical Physics","article_type":"original"}