Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cooling arbitrary near-critical systems using hyperbolic quenches   We describe a quench protocol that allows the rapid preparation of ground
states of arbitrary interacting conformal field theories in $1+1$ dimensions.
We start from the ground state of a related gapped relativistic quantum field
theory and consider sudden quenches along the space-like trajectories $t^2 -
x^2 = T^2_0$ (parameterized by $T_0$) to a conformal field theory. Using only
arguments of symmetry and conformal invariance, we show that the post-quench
stress-energy tensor of the conformal field theory is uniquely constrained up
to an overall scaling factor. Crucially, the $\textit{geometry}$ of the quench
necessitates that the system approach the vacuum energy density over all space
except the singular lines $x = \pm t$. The above arguments are verified using
an exact treatment of the quench for the Gaussian scalar field theory
(equivalently, the Luttinger liquid), and numerically for the quantum $O(N)$
model in the large-$N$ limit. Additionally, for the Gaussian theory, we find in
fact that even when starting from certain excited states, the quench conserves
entropy, and is thus also suitable for rapidly preparing excited states. Our
methods serve as a fast, alternative route to reservoir-based cooling to
prepare quantum states of interest.

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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: cs