Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Light by light diffraction in vacuum   We show that a laser beam can be diffracted by a more concentrated light
pulse due to quantum vacuum effects. We compute analytically the intensity
pattern in a realistic experimental configuration, and discuss how it can be
used to measure for the first time the parameters describing photon-photon
scattering in vacuum. In particular, we show that the Quantum Electrodynamics
prediction can be detected in a single-shot experiment at future 100 petawatt
lasers such as ELI or HIPER. On the other hand, if carried out at one of the
present high power facilities, such as OMEGA EP, this proposal can lead either
to the discovery of non-standard physics, or to substantially improve the
current PVLAS limits on the photon-photon cross section at optical wavelengths.
This new example of manipulation of light by light is simpler to realize and
more sensitive than existing, alternative proposals, and can also be used to
test Born-Infeld theory or to search for axion-like or minicharged particles.

34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga