Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing confinement in a $\mathbb{Z}_2$ lattice gauge theory on a
  quantum computer   Digital quantum simulators provide a table-top platform for addressing
salient questions in particle and condensed-matter physics. A particularly
rewarding target is given by lattice gauge theories (LGTs). Their constituents,
e.g., charged matter and the electric gauge field, are governed by local gauge
constraints, which are highly challenging to engineer and which lead to
intriguing yet not fully understood features such as confinement of particles.
Here, we simulate confinement dynamics in a $\mathbb{Z}_2$ LGT on a
superconducting quantum chip. We synthesize the charge--gauge-field interaction
using only 6 native two-qubit gates, enabling us to reach simulation times of
up to 25 Trotter steps. We observe how tuning a term that couples only to the
electric field confines the charges, a manifestation of the tight bond that the
local gauge constraint generates between both. Moreover, we study a different
mechanism, where a modification of the gauge constraint from a $\mathbb{Z}_2$
to $U(1)$ symmetry freezes the system dynamics. Our work showcases the dramatic
restriction that the underlying gauge constraint imposes on the dynamics of an
LGT, it illustrates how gauge constraints can be modified and protected, and it
paves the way for studying other models governed by many-body interactions.

2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol