Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Simulation of Ultrafast Dynamics Using Trapped Ultracold Atoms   Ultrafast electronic dynamics are typically studied using pulsed lasers. We
demonstrate a complementary experimental approach: quantum simulation of
ultrafast dynamics using trapped ultracold atoms. Counter-intuitively, this
technique emulates some of the fastest processes in atomic physics with some of
the slowest, leading to a temporal magnification factor of up to twelve orders
of magnitude. In these experiments, time-varying forces on neutral atoms in the
ground state of a tunable optical trap emulate the electric fields of a pulsed
laser acting on bound charged particles. We demonstrate the correspondence with
ultrafast science by a sequence of experiments: nonlinear spectroscopy of a
many-body bound state, control of the excitation spectrum by potential shaping,
observation of sub-cycle unbinding dynamics during strong few-cycle pulses, and
direct measurement of carrier-envelope phase dependence of the response to an
ultrafast-equivalent pulse. These results establish cold atom quantum
simulation as a complementary tool for studying ultrafast dynamics.

35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an