Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recovering the homogeneous absorption of inhomogeneous media   The resonant absorption of light by an ensemble of absorbers decreases when
the resonance is inhomogeneously broadened, as only a fraction of the ensemble
contributes to the absorption at any given optical frequency. Recovering the
lost absorption cross-section is of great importance for various applications
of light-matter interactions, particularly in quantum optics and for few-photon
nonlinearities. However, no recovery mechanism has yet been identified and
successfully demonstrated. Here, we first formulate the limit set by the
inhomogeneity on the absorption and then present a mechanism able to circumvent
this limit and fully recover the homogeneous absorption of the ensemble. We
experimentally study this mechanism using hot atomic vapor and demonstrate a
5-fold enhancement of the absorption above the inhomogeneous limit. Our scheme
relies on light shifts induced by auxiliary fields and is thus applicable to
various physical systems and inhomogeneity mechanisms.

8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org