Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Suppression of interference in quantum Hall Mach-Zehnder geometry by
  upstream neutral modes   Mach-Zehnder interferometry has been proposed as a probe for detecting the
statistics of anyonic quasiparticles in fractional quantum Hall (FQH) states.
Here we focus on interferometers made of multimode edge states with upstream
modes. We find that the interference visibility is suppressed due to
downstream-upstream mode entanglement; the latter serves as a "which path"
detector to the downstream interfering trajectories. Our analysis tackles a
concrete realization of filling factor 2/3, but its applicability goes beyond
that specific case, and encompasses the recent observation of ubiquitous
emergence of upstream neutral modes in FQH states. The latter, according to our
analysis, goes hand in hand with the failure to observe Mach-Zehnder anyonic
interference in fractional states. We point out how charge-neutral mode
disentanglement will resuscitate the interference signal.

10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg