Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement in fermion systems and quantum metrology   Entanglement in fermion many-body systems is studied using a generalized
definition of separability based on partitions of the set of observables,
rather than on particle tensor products. In this way, the characterizing
properties of non-separable fermion states can be explicitly analyzed, allowing
a precise description of the geometric structure of the corresponding state
space. These results have direct applications in fermion quantum metrology:
sub-shot noise accuracy in parameter estimation can be obtained without the
need of a preliminary state entangling operation.

23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess