Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Valley Isospin Controlled Fractional Quantum Hall States in Bilayer
  Graphene   Electron spin and pseudospin degrees of freedom play a critical role in
many-body phenomena through exchange interactions, the understanding and
control of which enable the construction of states with complex topological
orders and exotic excitations. In this work, we demonstrate fine control of the
valley isospin in high-quality bilayer graphene devices and its profound impact
in realizing fractional quantum Hall effect with different ground state orders.
We present evidence for a new even-denominator fractional quantum Hall state in
bilayer graphene, its spontaneous valley polarization in the limit of zero
valley Zeeman energy, and the breaking of particle-hole symmetry. These
observations support the Moore-Read anti-Pfaffian order. Our experiments
establish valley isospin in bilayer graphene to be a powerful experimental knob
and open the door to engineering non-Abelian states and quantum information
processes in a quantum Hall platform.

15
The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
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The categories of this paper are: eess
32
The categories of this paper are: atom-ph