11 citations · 29 across the 10 of their papers we have counts for
4 papers · 1 filter
Helicity is a topological invariant of massless particles: C=-2h
Eric Palmerduca, Hong Qin
There is an elementary but indispensable relationship between the topology and geometry of massive particles. The geometric spin is related to the topological dimension of the…
Four no-go theorems on the existence of spin and orbital angular momentum of massless bosons
Eric Palmerduca, Hong Qin
The past decades have seen substantial interest in the so-called orbital angular momentum (OAM) of light, driven largely by its diverse range of applications. However, there are fu…
Graviton topology
Eric Palmerduca, Hong Qin
Over the past three decades, it has been shown that discrete and continuous media can support topologically nontrivial waves. Recently, it was shown that the same is true of the va…
Oblique photons, plasmons, and current-plasmons in relativistic plasmas and their topological implications
Hong Qin, Eric Palmerduca
Photons in vacuum are transverse in any inertial frame; longitudinal photons only exist virtually. By developing a manifestly covariant theory for electromagnetic excitations in re…