Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collapsing Schr\"odinger Cats in the Density Matrix Renormalization
  Group   In this paper, we propose a modified Density Matrix Renormalization Group
(DMRG) algorithm to preferentially select minimum entropy states (minimally
entangled states) in finite systems with asymptotic ground state degeneracy.
The algorithm adds a "quench" process to the conventional DMRG method, which
mimics the decoherence of physical systems, and collapses non-locally entangled
states such as Schr\"odinger cats. We show that the method works for
representative models with ground state degeneracy arising from either
topological order or spontaneous discrete symmetry breaking. In the minimal
entropy states thus obtained, properties associated with thermodynamic limit,
such as topological entanglement entropy and magnetic order parameters, can be
obtained directly and efficiently.

5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn