Strong-coupling solution of the bosonic dynamical mean-field theory

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F12%3A00383920" target="_blank" >RIV/68378271:_____/12:00383920 - isvavai.cz</a>
Result on the web
<a href="http://prb.aps.org/abstract/PRB/v85/i20/e205115" target="_blank" >http://prb.aps.org/abstract/PRB/v85/i20/e205115</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.85.205115" target="_blank" >10.1103/PhysRevB.85.205115</a>

Result language
angličtina
Original language name
Strong-coupling solution of the bosonic dynamical mean-field theory
Original language description
We derive an approximate analytical solution of the self-consistency equations of the bosonic dynamical mean-field theory (B-DMFT) in the strong-coupling limit. The approach is based on a linked-cluster expansion in the hybridization function of normal bosons around the atomic limit. The solution is used to compute the phase diagram of the bosonic Hubbard model for different lattices. We compare our results with numerical solutions of the B-DMFT equations and numerically exact methods, respectively. Thevery good agreement with those numerical results demonstrates that our approach captures the essential physics of correlated bosons both in the Mott insulator and in the superfluid phase.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BE - Theoretical physics
OECD FORD branch
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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