54 citations · 189 across the 8 of their papers we have counts for
9 papers
Exact algebraic separation of the gravitoelectromagnetic perturbations of Kerr-Newman-(anti-)de Sitter black holes
Jun-Kun Zhao
We obtain an explicit separation of the coupled gravitational and electromagnetic radiative equations on nonextremal Kerr--Newman--(anti-)de Sitter black holes with nonzero charge…
Time evolutions of scalar field perturbations in -dimensional Reissner-Nordström Anti-de Sitter black holes
Ran Li, Hongbao Zhang, Junkun Zhao
Reissner-Nordström Anti-de Sitter (RNAdS) black holes are unstable against the charged scalar field perturbations due to the well-known superradiance phenomenon. We present the tim…
Zero Temperature Holographic Superfluids with Two Competing Orders
Ran Li, Yu Tian, Hongbao Zhang +1
We initiate the investigation of the zero temperature holographic superfluids with two competing orders, where besides the vacuum phase, two one band superfluid phases, the coexist…
Scalar waves from a star orbiting a BTZ black hole
Xing-Hua Wu, Ran Li, Jun-Kun Zhao
In this paper we compute the decay rates of massless scalar waves excited by a star circularly orbiting around the non-extremal (general) and extremal BTZ black holes. These decay…
Time domain analysis of superradiant instability for the charged stringy black hole-mirror system
Ran Li, Yu Tian, Hongbao Zhang +1
It has been proved that the charged stringy black holes are stable under the perturbations of massive charged scalar fields. However, superradiant instability can be generated by a…
Two-dimensional topological order of kinetically constrained quantum particles
Stefanos Kourtis, Claudio Castelnovo
We investigate how imposing kinetic restrictions on quantum particles that would otherwise hop freely on a two-dimensional lattice can lead to topologically ordered states. The kin…
Numerical study of superradiant instability for charged stringy black hole-mirror system
Ran Li, Junkun Zhao
We numerically study the superradiant instability of charged massless scalar field in the background of charged stringy black hole with mirror-like boundary condition. We compare t…
Superradiant instability of D-dimensional Reissner-Nordström black hole mirror system
Ran Li, Zhaojun Kun, Yanming Zhang
We analytically study the superradiant instability of a charged massless scalar field in the background of D-dimensional Reissner-Nordström (RN) black hole caused by the mirror's b…
Superradiant instability of the charged scalar field in stringy black hole mirror system
Ran Li, Junkun Zhao
It has been shown that the mass of the scalar field in the charged stringy black hole is never able to generate a potential well outside the event horizon to trap the superradiant…