Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A quantum mechanical scheme to reduce radiation damage in electron
  microscopy   We show that radiation damage to unstained biological specimens is not an
intractable problem in electron microscopy. When a structural hypothesis of a
specimen is available, quantum mechanical principles allow us to verify the
hypothesis with a very low electron dose. Realization of such a concept
requires precise control of the electron wave front. Based on a diffractive
electron optical implementation, we demonstrate the feasibility of this new
method by both experimental and numerical investigations.

24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph