Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin frustration and fermionic entanglement in an exactly solved hybrid
  diamond chain with the localized Ising spins and mobile electrons   The strongly correlated spin-electron system on a diamond chain containing
localized Ising spins on its nodal lattice sites and mobile electrons on its
interstitial sites is exactly solved in a magnetic field using the
transfer-matrix method. We have investigated in detail all available ground
states, the magnetization processes, the spin-spin correlation functions around
an elementary plaquette, fermionic quantum concurrence and spin frustration. It
is shown that the fermionic entanglement between mobile electrons hopping on
interstitial sites and the kinetically-induced spin frustration are closely
related yet independent phenomena. In the ground state, quantum entanglement
only appears within a frustrated unsaturated paramagnetic phase, while thermal
fluctuations can promote some degree of quantum entanglement above the
non-frustrated ground states with saturated paramagnetic or classical
ferrimagnetic spin arrangements.

8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph