Contour-time approach to the Bose–Hubbard model in the strong coupling regime: Studying two-point spatio-temporal correlations at the Hartree–Fock–Bogoliubov level
We develop a formalism that allows the study of correlations in space and time in both the superfluid and Mott insulating phases of the Bose–Hubbard Model. Specifically, we obtain a two particle irreducible effective action within the contour-time formalism that allows for both equilibrium and out o...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-05-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S055032131830066X |