Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum purification spectroscopy   We discuss a protocol based on quenching a purified quantum system that
allows to capture bulk spectral features. It uses an infinite temperature
initial state and an interferometric strategy to access the Loschmidt
amplitude, from which the spectral features are retrieved via Fourier
transform, providing coarse-grained approximation at finite times. It involves
techniques available in current experimental setups for quantum simulation, at
least for small systems. We illustrate possible applications in testing the
eigenstate thermalization hypothesis and the physics of many-body localization.

10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs