17 citations · 43 across the 9 of their papers we have counts for
9 papers
Radial modes of pressure bumps and dips in astrophysical discs
Armand Leclerc, Guillaume Laibe, Elliot Lynch +1
This study investigates the signatures of pressure extrema on global oscillations in discs. To this end, we use the framework of wave topology to establish a generalised local disp…
Wave topology of stellar inertial oscillations
Armand Leclerc, Guillaume Laibe, Nicolas Perez
Inertial waves in convective regions of stars exhibit topological properties linked to a Chern number of 1. The first of these is a unique, unidirectional, prograde oscillation mod…
PT and anti-PT symmetries for astrophysical waves
Armand Leclerc, Guillaume Laibe, Nicolas Perez
Context: Discrete symmetries have found numerous applications in photonics and quantum mechanics, but remain little studied in fluid mechanics, particularly in astrophysics. Aims:…
Topology of shallow-water waves on the rotating sphere
Nicolas Perez, Armand Leclerc, Guillaume Laibe +1
Topological properties of the spectrum of shallow-water waves on a rotating spherical body are established. Particular attention is paid to its spectral flow, i.e. the modes whose…
The Exceptional Ring of buoyancy instability in stars
Armand Leclerc, Lucien Jezequel, Nicolas Perez +3
We reveal properties of global modes of linear buoyancy instability in stars, characterised by the celebrated Schwarzschild criterion, using non-Hermitian topology. We identify a r…
Topological modes in stellar oscillations
Armand Leclerc, Guillaume Laibe, Pierre Delplace +2
Stellar oscillations can be of topological origin. We reveal this deep and so-far hidden property of stars by establishing a novel parallel between stars and topological insulators…
From ray tracing to waves of topological origin in continuous media
Antoine Venaille, Yohei Onuki, Nicolas Perez +1
Inhomogeneous media commonly support a discrete number of wave modes that are trapped along interfaces defined by spatially varying parameters. When they are robust against continu…
Unidirectional modes induced by nontraditional Coriolis force in stratified fluids
Nicolas Perez, Pierre Delplace, Antoine Venaille
Using topology, we unveil the existence of new unidirectional modes in compressible rotating stratified fluids. We relate their emergence to the breaking of time-reversal symmetry…
Manifestation of Berry curvature in geophysical ray tracing
Nicolas Perez, Pierre Delplace, Antoine Venaille
Geometrical phases, such as the Berry phase, have proven to be powerful concepts to understand numerous physical phenomena, from the precession of the Foucault pendulum to the quan…