Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective photon routing improvement in a dissipative quantum emitter
  chain strongly coupled to a chiral waveguide QED ladder   We examine the routing scheme of single photons in a one-dimensional periodic
chain of two-level quantum emitters (QEs) strongly coupled to two waveguides in
a ladder configuration. It is known that for a single-emitter chiral waveguide
ladder setting, photons can be redirected from one waveguide to another with a
$100\%$ probability (deterministically) provided the resonance condition is met
and spontaneous emission is completely ignored. However, when the spontaneous
emission is included the routing scheme becomes considerably imperfect. In this
paper, we present a solution to this issue by considering a chain of QEs where
in addition to the waveguide mediated interaction among emitters, a direct and
infinitely long-ranged dipole-dipole interaction (DDI) is taken into account.
We show that the collective effects arising from the strong DDI protect the
routing scheme from spontaneous emission loss. In particular, we demonstrate
that the router operation can be improved from $58\%$ to $95\%$ in a typical
dissipative chiral light-matter interface consisting of nanowires modes
strongly interacting with a linear chain of 30 quantum dots. With the recent
experimental progress in chiral quantum optics, trapped QEs evanescently
coupled to tapered nanofibers can serve as a platform for the experimental
realization of this work.

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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an