Journal
PHYSICAL REVIEW B
Volume 100, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.054109
Keywords
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Funding
- JSPS KAKENHI [JP16K13845, JP17H06138, JP18H05842]
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We propose mechanical systems, described by Newton's equation of motion, as suited platforms for symmetry protection of non-Hermitian degeneracies. We point out that in contrast to other systems with gain and loss, fine tuning of parameters is not required to realize symmetry-protected non-Hermitian degeneracies due to an emergent property of mechanical systems. The presence of symmetry-protected exceptional rings with extended chiral symmetry is numerically demonstrated for a mechanical graphene with friction. Furthermore, classification of symmetry-protected non-Hermitian degeneracies is addressed by taking into account the emergent properties of mechanical systems.
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