Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intrinsic Calibration of Molecular Alignment Using Rotational Echoes   We propose and experimentally validate the use of rotational echo responses
for obtaining the degree of molecular alignment induced in a gas. The method is
independent of various parameters that are hardly accessible in most
experimental configurations such as the effective length of interaction and the
gas density as it relies on the intrinsic, self-contained dynamics of the
rotational echo response.

14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci