Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interacting in-plane molecular dipoles in a zig-zag chain   The system with externally polarized dipole molecules at half-filling moving
along a one-dimensional zig-zag chain is studied theoretically, including the
ground-state phase diagram. The dipoles are oriented in-plane. Together with
the geometry of the chain this gives rise to a bond-alternating nearest
neighbor interaction due to simultaneous attractive and repulsive interactions.
Because of the quantum Zeno effect due to the reactive nature of molecules the
system can be treated as hard-core. By tuning the ratio between the
nearest-neighbor interaction and hopping, various phases can be accessed by
controlling the polarization angle. In the ultra-strong coupling limit, the
system simplifies to a frustrated extended axial Ising model. For the small
coupling limit, qualitative discussion of the ordering behavior using effective
field theory arguments is provided. We show that when chain angle is small, the
system mostly exhibits BKT-type phase transitions, whereas large chain angle
would drive the system into a gapped (Ising) dimerized phase, where the hopping
strength is closely related to the orientation of dimerized pairs.

11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an