Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Phases of Ultra Cold Bosons in Incommensurate 1D Optical
  Lattices   We study theoretically a BEC loaded into an optical lattice in the
tight-binding regime, with a second, weak incommensurate lattice acting as a
perturbation. We find, using direct diagonalization of small systems and a
large scale, number conserving Gutzwiller-based mean field approach, the phase
diagram of the model. We show that the superfluid, Mott-insulator and
Bose-glass phases familiar from disordered systems appear here as well, with a
localization transition occurring already in a 1D geometry, contrary to the
well known Anderson localization. We complement these results with GPE
simulations, and stress the fundamental difference between commensurate and
incommensurate lattices. These results, together with calculations we have
performed for realistic scenarios, suggest that this setup is well suited for
available experimental realizations.

34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con