Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of circular polarization in light scattered from
  photosynthetic microbes   The identification of a universal biosignature that could be sensed remotely
is critical to the prospects for success in the search for life elsewhere in
the universe. A candidate universal biosignature is homochirality, which is
likely to be a generic property of all biochemical life. Due to the optical
activity of chiral molecules, it has been hypothesized that this unique
characteristic may provide a suitable remote sensing probe using circular
polarization spectroscopy. Here, we report the detection of circular
polarization in light scattered by photosynthetic microbes. We show that the
circular polarization appears to arise from circular dichroism of the strong
electronic transitions of photosynthetic absorption bands. We conclude that
circular polarization spectroscopy could provide a powerful remote sensing
technique for generic life searches.

1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th