Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cell strong coupling perturbative approach to the phase diagram of
  ultracold bosons in optical superlattices   The phase diagram of ultracold bosons in realistic optical superlattices is
addressed via second-order {\it cell} strong coupling perturbative expansions
for the Bose-Hubbard model describing the system. Taking advantage of the cell
partition inherent in the complex periodic modulation of a superlattice, this
technique allows for the description of the unusual loophole-shaped insulator
domains that may occur in the phase diagram of the system, unlike the standard
perturbative approach. Furthermore, comparisons with quantum Monte Carlo
simulations show that our approach provides quantitatively satisfactory results
at a significantly lower computational cost than brute force numerical methods.
We explicitly consider the phase diagrams for two realistic 3-periodic optical
superlattices. These show that many insulator domains exhibit an unusual
reentrant character, which we discuss, and suggest that the quantum phase
transition relevant to the loophole-shaped insulating domains does not require
extreme experimental condition in order to be observed.

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The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn