Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monopole Josephson Effects in a Dirac Spin Liquid   Dirac Spin liquids (DSLs) are gapless featureless states, yet interesting by
virtue of the effective field theory describing them -- (2+1)-dimensional
quantum electrodynamics (QED$_3$). Further, a DSL is known to be a "parent
state" of various seemingly unrelated ordered states, such as antiferromagnets
and valence bond solids in the sense that one can obtain ordered states by
condensing magnetic monopoles of the emergent gauge field. Can operators in the
effective field theory, such as the emergent electric field, be externally
induced and measured? In this work, we exploit the parent state picture to
argue that the answer is yes. We propose a range of "monopole Josephson
effects" that arise when two ordered states are separated by a region of the
parent DSL. In particular, we show that one can induce an AC monopole Josephson
effect, which manifests itself as an AC emergent electric field in the spin
liquid, accompanied by a measurable spin current. Further, we show that this AC
emergent electric field can be measured as a sharp tunable peak in Raman
scattering. This work provides a theoretical proof of principle that emergent
gauge fields in spin liquids can be externally induced, manipulated, and probed
using more conventional states, which offers a generic platform for studying
the exotic spin phases.

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The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
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The categories of this paper are: eess
36
The categories of this paper are: cmp-lg