Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Focusing inside Disordered Media with the Generalized Wigner-Smith
  Operator   We introduce a wavefront shaping protocol for focusing inside disordered
media based on a generalization of the established Wigner-Smith time-delay
operator. The key ingredient for our approach is the scattering (or
transmission) matrix of the medium and its derivative with respect to the
position of the target one aims to focus on. A specifc experimental realization
in the microwave regime is presented showing that the eigenstates of a
corresponding operator are sorted by their focusing strength - ranging from
strongly focusing on the designated target to completely bypassing it. Our
protocol works without optimization or phase-conjugation and we expect it to be
particularly attractive for optical imaging in disordered media.

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The categories of this paper are: hep-th
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The categories of this paper are: nlin
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
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The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph