Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetric minimally entangled typical thermal states for canonical and
  grand-canonical ensembles   Based on the density matrix renormalization group (DMRG), strongly correlated
quantum many-body systems at finite temperatures can be simulated by sampling
over a certain class of pure matrix product states (MPS) called minimally
entangled typical thermal states (METTS). When a system features symmetries,
these can be utilized to substantially reduce MPS computation costs. It is
conceptually straightforward to simulate canonical ensembles using symmetric
METTS. In practice, it is important to alternate between different symmetric
collapse bases to decrease autocorrelations in the Markov chain of METTS. To
this purpose, we introduce symmetric Fourier and Haar-random block bases that
are efficiently mixing. We also show how grand-canonical ensembles can be
simulated efficiently with symmetric METTS. We demonstrate these approaches for
spin-1/2 XXZ chains and discuss how the choice of the collapse bases influences
autocorrelations as well as the distribution of measurement values and, hence,
convergence speeds.

23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys