Dynamic density-density correlations in interacting Bose gases on optical lattices. Ejima, S., Fehske, H., & Gebhard, F. Journal of Physics: Conference Series, 391(1):012143, December, 2012. ![Dynamic density-density correlations in interacting Bose gases on optical lattices [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex In order to identify possible experimental signatures of the superfluid to Mott-insulator quantum phase transition we calculate the charge structure factor S(k, ω) for the one-dimensional Bose-Hubbard model using the dynamical density-matrix renormalisation group (DDMRG) technique. Particularly we analyse the behaviour of S(k, ω) by varying – at zero temperature–the Coulomb interaction strength within the first Mott lobe. For strong interactions, in the Mott-insulator phase, we demonstrate that the DDMRG results are well reproduced by a strong-coupling expansion, just as the quasi-particle dispersion. In the super-fluid phase we determine the linear excitation spectrum near k = 0. In one dimension, the amplitude mode is absent which mean-field theory suggests for higher dimensions.
@article{ejima_dynamic_2012,
title = {Dynamic density-density correlations in interacting {Bose} gases on optical lattices},
volume = {391},
issn = {1742-6596},
url = {http://iopscience.iop.org/1742-6596/391/1/012143},
doi = {10.1088/1742-6596/391/1/012143},
abstract = {In order to identify possible experimental signatures of the superfluid to Mott-insulator quantum phase transition we calculate the charge structure factor S(k, ω) for the one-dimensional Bose-Hubbard model using the dynamical density-matrix renormalisation group (DDMRG) technique. Particularly we analyse the behaviour of S(k, ω) by varying – at zero temperature–the Coulomb interaction strength within the first Mott lobe. For strong interactions, in the Mott-insulator phase, we demonstrate that the DDMRG results are well reproduced by a strong-coupling expansion, just as the quasi-particle dispersion. In the super-fluid phase we determine the linear excitation spectrum near k = 0. In one dimension, the amplitude mode is absent which mean-field theory suggests for higher dimensions.},
language = {en},
number = {1},
urldate = {2015-02-06},
journal = {Journal of Physics: Conference Series},
author = {Ejima, S. and Fehske, H. and Gebhard, F.},
month = dec,
year = {2012},
pages = {012143},
file = {Ejima et al_2012_Dynamic density-density correlations in interacting Bose gases on optical.pdf:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/HTX5EE7W/Ejima et al_2012_Dynamic density-density correlations in interacting Bose gases on optical.pdf:application/pdf;Snapshot:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/FZGKI2IP/012143.html:text/html}
}
Downloads: 0
{"_id":"x2pJPXY3bgBuaTKKa","bibbaseid":"ejima-fehske-gebhard-dynamicdensitydensitycorrelationsininteractingbosegasesonopticallattices-2012","downloads":0,"creationDate":"2016-05-03T10:04:14.998Z","title":"Dynamic density-density correlations in interacting Bose gases on optical lattices","author_short":["Ejima, S.","Fehske, H.","Gebhard, F."],"year":2012,"bibtype":"article","biburl":"http://theorie2.physik.uni-greifswald.de/tmp/theorie2.bib","bibdata":{"bibtype":"article","type":"article","title":"Dynamic density-density correlations in interacting Bose gases on optical lattices","volume":"391","issn":"1742-6596","url":"http://iopscience.iop.org/1742-6596/391/1/012143","doi":"10.1088/1742-6596/391/1/012143","abstract":"In order to identify possible experimental signatures of the superfluid to Mott-insulator quantum phase transition we calculate the charge structure factor S(k, ω) for the one-dimensional Bose-Hubbard model using the dynamical density-matrix renormalisation group (DDMRG) technique. Particularly we analyse the behaviour of S(k, ω) by varying – at zero temperature–the Coulomb interaction strength within the first Mott lobe. For strong interactions, in the Mott-insulator phase, we demonstrate that the DDMRG results are well reproduced by a strong-coupling expansion, just as the quasi-particle dispersion. In the super-fluid phase we determine the linear excitation spectrum near k = 0. In one dimension, the amplitude mode is absent which mean-field theory suggests for higher dimensions.","language":"en","number":"1","urldate":"2015-02-06","journal":"Journal of Physics: Conference Series","author":[{"propositions":[],"lastnames":["Ejima"],"firstnames":["S."],"suffixes":[]},{"propositions":[],"lastnames":["Fehske"],"firstnames":["H."],"suffixes":[]},{"propositions":[],"lastnames":["Gebhard"],"firstnames":["F."],"suffixes":[]}],"month":"December","year":"2012","pages":"012143","file":"Ejima et al_2012_Dynamic density-density correlations in interacting Bose gases on optical.pdf:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/HTX5EE7W/Ejima et al_2012_Dynamic density-density correlations in interacting Bose gases on optical.pdf:application/pdf;Snapshot:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/FZGKI2IP/012143.html:text/html","bibtex":"@article{ejima_dynamic_2012,\n\ttitle = {Dynamic density-density correlations in interacting {Bose} gases on optical lattices},\n\tvolume = {391},\n\tissn = {1742-6596},\n\turl = {http://iopscience.iop.org/1742-6596/391/1/012143},\n\tdoi = {10.1088/1742-6596/391/1/012143},\n\tabstract = {In order to identify possible experimental signatures of the superfluid to Mott-insulator quantum phase transition we calculate the charge structure factor S(k, ω) for the one-dimensional Bose-Hubbard model using the dynamical density-matrix renormalisation group (DDMRG) technique. Particularly we analyse the behaviour of S(k, ω) by varying – at zero temperature–the Coulomb interaction strength within the first Mott lobe. For strong interactions, in the Mott-insulator phase, we demonstrate that the DDMRG results are well reproduced by a strong-coupling expansion, just as the quasi-particle dispersion. In the super-fluid phase we determine the linear excitation spectrum near k = 0. In one dimension, the amplitude mode is absent which mean-field theory suggests for higher dimensions.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2015-02-06},\n\tjournal = {Journal of Physics: Conference Series},\n\tauthor = {Ejima, S. and Fehske, H. and Gebhard, F.},\n\tmonth = dec,\n\tyear = {2012},\n\tpages = {012143},\n\tfile = {Ejima et al_2012_Dynamic density-density correlations in interacting Bose gases on optical.pdf:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/HTX5EE7W/Ejima et al_2012_Dynamic density-density correlations in interacting Bose gases on optical.pdf:application/pdf;Snapshot:/home/schlady/.zotero/zotero/za3jlr8i.default/zotero/storage/FZGKI2IP/012143.html:text/html}\n}\n\n","author_short":["Ejima, S.","Fehske, H.","Gebhard, F."],"key":"ejima_dynamic_2012","id":"ejima_dynamic_2012","bibbaseid":"ejima-fehske-gebhard-dynamicdensitydensitycorrelationsininteractingbosegasesonopticallattices-2012","role":"author","urls":{"Paper":"http://iopscience.iop.org/1742-6596/391/1/012143"},"downloads":0,"html":""},"search_terms":["dynamic","density","density","correlations","interacting","bose","gases","optical","lattices","ejima","fehske","gebhard"],"keywords":[],"authorIDs":[],"dataSources":["NNzLf23uJ9Wdymi4q"]}