Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimal Quench for Distance-Independent Entanglement and Maximal Block
  Entropy   We optimize a quantum walk of multiple fermions following a quench in a spin
chain to generate near ideal resources for quantum networking. We first prove
an useful theorem mapping the correlations evolved from specific quenches to
the apparently unrelated problem of quantum state transfer between distinct
spins. This mapping is then exploited to optimize the dynamics and produce
large amounts of entanglement distributed in very special ways. Two
applications are considered: the simultaneous generation of many Bell states
between pairs of distant spins (maximal block entropy), or high entanglement
between the ends of an arbitrarily long chain (distance-independent
entanglement). Thanks to the generality of the result, we study its
implementation in different experimental setups using present technology: NMR,
ion traps and ultracold atoms in optical lattices.

22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom