Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-spin entanglement induced by electron scattering in nanostructures   We present a model where two magnetic impurities in a discrete tight-binding
ring become entangled because of scattering processes associated to the
injection of a conduction electron. We introduce a weak coupling approximation
that allows us to solve the problem in a analytical way and compare the theory
with the exact numerical results. We obtain the generation of entanglement both
in a deterministic way and in a probabilistic one. The first case is
intrinsically related to the structure of the two-impurity reduced density
matrix, while the second one occurs when a projection on the electron state is
performed.

24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio