Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A recursive approach for geometric quantifiers of quantum correlations
  in multiqubit Schr\"odinger cat states   A recursive approach to determine the Hilbert-Schmidt measure of pairwise
quantum discord in a special class of symmetric states of $k$ qubits is
presented. We especially focus on the reduced states of $k$ qubits obtained
from a balanced superposition of symmetric $n$-qubit states (multiqubit
Schr\"odinger cat states) by tracing out $n-k$ particles $(k=2,3, \cdots
,n-1)$. Two pairing schemes are considered. In the first one, the geometric
discord measuring the correlation between one qubit and the party grouping
$(k-1)$ qubits is explicitly derived. This uses recursive relations between the
Fano-Bloch correlation matrices associated with subsystems comprising $k$,
$k-1$, $\cdots$ and $2$ particles. A detailed analysis is given for two, three
and four qubit systems. In the second scheme, the subsystem comprising the
$(k-1)$ qubits is mapped into a system of two logical qubits. We show that
these two bipartition schemes are equivalents in evaluating the pairwise
correlation in multi-qubits systems. The explicit expressions of classical
states presenting zero discord are derived.

20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex