Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bipolaron in the t-J model coupled to longitudinal and transverse
  quantum lattice vibrations   We explore the influence of two different polarizations of quantum oxygen
vibrations on the spacial symmetry of the bound magnetic bipolaron in the
context of the t-J model by using exact diagonalization within a limited
functional space. Quadratic electron phonon coupling to transverse polarization
stabilizes d-wave symmetry. The existence of a magnetic background is essential
for the formation of a d-wave bipolaron state. With increasing linear electron
phonon coupling to longitudinal polarization the symmetry of a d-wave bipolaron
state changes to a p-wave. Bipolaron develops a large anisotropic effective
mass.

12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math