Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time and momentum-resolved tunneling spectroscopy of pump-driven
  non-thermal excitations in Mott insulators   We present a computational technique to calculate time and momentum resolved
non-equilibrium spectral density of correlated systems using a tunneling
approach akin scanning tunneling spectroscopy. The important difference is that
our probe is extended, basically a copy of the sample, allowing one to extract
the momentum information of the excitations. We illustrate the method by
measuring the spectrum of a Mott-insulating extended Hubbard chain after a
sudden quench with the aid of time-dependent density matrix renormalization
group (tDMRG) calculations. We demonstrate that the system realizes a
non-thermal state that is an admixture of spin and charge density wave states,
with corresponding signatures that are recognizable as in-gap sub-bands. In
particular, we identify a band of excitons and one of stable anti-bound states
at high energies that gains enhanced visibility after the pump. We do not
appreciate noticeable relaxation within the time-scales considered, which is
attributed to the lack of decay channels due to spin-charge separation. These
ideas can be readily applied to study transient dynamics and spectral
signatures of correlation-driven non-equilibrium processes.

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The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc