804 citations · 3.3k across the 158 of their papers we have counts for
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Fundamental Physics and Cosmology with TianQin
Jun Luo, Haipeng An, Ligong Bian +33
The exploration of the surrounding world and the universe is an important theme in the legacy of humankind. The detection of gravitational waves is adding a new dimension to this g…
Gravitational and electromagnetic radiation from binary black holes with electric and magnetic charges: Hyperbolic orbits on a cone
Zu-Cheng Chen, Sang Pyo Kim, Lang Liu
We derive the hyperbolic orbit of binary black holes with electric and magnetic charges. In the low-velocity and weak-field regime, by using the Newtonian method, we calculate the…
Merger rate of charged black holes from the two-body dynamical capture
Lang Liu, Sang Pyo Kim
We consider the two-body dynamical capture of black holes carrying U(1) charge which can not only correspond to electric or magnetic charge but also have other physical interpretat…
Gravitational and electromagnetic radiations from binary black holes with electric and magnetic charges
Lang Liu, Sang Pyo Kim
The Einstein-Maxwell theory has black hole solutions with electric and magnetic charges. In the standard model for particle physics, dyons with electric and magnetic charges would…
Gravitational and electromagnetic radiation from binary black holes with electric and magnetic charges: Elliptical orbits on a cone
Lang Liu, Øyvind Christiansen, Wen-Hong Ruan +3
Extending the electromagnetic and gravitational radiations from binary black holes with electric and magnetic charges in circular orbits in Phys. Rev. D {\bf 102}, 103520 (2020), w…
Gravitational and electromagnetic radiation from binary black holes with electric and magnetic charges: Circular orbits on a cone
Lang Liu, Øyvind Christiansen, Zong-Kuan Guo +2
We derive the equations of motion of dyonic black hole binaries with electric and magnetic charges and explore features of static orbits. By using a Newtonian method with the inclu…
Astrophysics in Strong Electromagnetic Fields and Laboratory Astrophysics
Sang Pyo Kim
Recent observations of gravitational waves from binary mergers of black holes or neutron stars and the rapid development of ultra-intense lasers lead strong field physics to a fron…
Simulation of Quantum Universe
Sang Pyo Kim
Quantum simulation provides quantum systems under study with analogous controllable quantum systems and has wide applications from condensed-matter physics to high energy physics a…
Will quantum cosmology resurrect chaotic inflation model?
Sang Pyo Kim, Won Kim
The single field chaotic inflation model with a monomial power greater than one seems to be ruled out by the recent Planck and WMAP CMB data while Starobinsky model with a higher c…
Geometric Origin of Pair Production by Electric Field in de Sitter Space
Sang Pyo Kim
The particle production in a de Sitter space provides an interesting model to understand the curvature effect on Schwinger pair production by a constant electric field or Schwinger…
Particle Production from Geometric Transition in Expanding Universe
Sang Pyo Kim
The geometric transitions from the evolution in the complex plane of time provide channels for particle production for a quantum field in expanding universes. The production rate f…
Massive Scalar Field Quantum Cosmology
Sang Pyo Kim
We study the third quantized formulation of the massive inflaton quantum cosmology for the Friedmann-Robertson-Walker universe. The Hamiltonian is equivalent to an infinite number…
Third Quantization and Quantum Universes
Sang Pyo Kim
We study the third quantization of the Friedmann-Robertson-Walker cosmology with -minimal massless fields. The third quantized Hamiltonian for the WDW equation in the minisupers…
de Sitter Radiation and Backreaction in Quantum Cosmology
Je-An Gu, Sang Pyo Kim, Che-Min Shen
We explore the quantum cosmology description of the de Sitter (dS) radiation and its backreaction to dS space, inherent in the wave function of the Wheeler-DeWitt equation for pure…
Spacetime structure of 5D hypercylindrical vacuum solutions with tension
Inyong Cho, Gungwon Kang, Sang Pyo Kim +1
We investigate geometrical properties of 5D cylindrical vacuum solutions with a transverse spherical symmetry. The metric is uniform along the fifth direction and characterized by…
Quasinormal modes of black holes and dissipative open systems
Sang Pyo Kim
After explaining the physical origin of the quasinormal modes of perturbations in the background geometry of a black hole, I critically review the recent proposal for the quantizat…
Constraint on the Squeeze Parameter of Inflaton from Cosmological Constant
Sang Pyo Kim, Seoktae Koh
The inflaton is highly likely to settle in a squeezed vacuum state after inflation. The relic inflaton after inflation and reheating undergoes a damped oscillatory motion and contr…
Quantum Cosmology for Tunneling Universes
Sang Pyo Kim
In a quantum cosmological model consisting of a Euclidean region and a Lorentzian region, Hartle-Hawking's no-bounary wave function, and Linde's wave function and Vilenkin's tunnel…
Magnetic Black Holes Are Also Unstable
Sang Pyo Kim, Don N. Page
Most black holes are known to be unstable to emitting Hawking radiation (in asymptotically flat spacetime). If the black holes are non-extreme, they have positive temperature and e…
Gravitational Wave Spectrum in Inflation with Nonclassical States
Seoktae Koh, Sang Pyo Kim, Doo Jong Song
The initial quantum state during inflation may evolve to a highly squeezed quantum state due to the amplification of the time-dependent parameter, , which may be the…
Remarks on Schwinger Pair Production by Charged Black Holes
Sang Pyo Kim, Don N. Page
We introduce a canonical method for pair production by electromagnetic fields. The canonical method in the space-dependent gauge provides pair-production rate even for inhomogeneou…
Classical and Quantum Surgery of Geometries in an Open Inflationary Universe
Sang Pyo Kim
We study classically and quantum mechanically the Euclidean geometries compatible with an open inflationary universe of a Lorentzian geometry. The Lorentzian geometry of the open u…
Black Hole Decay and Quantum Instantons
Donsu Bak, Sang Pyo Kim, Sung Ku Kim +2
We study the analytic structure of the S-matrix which is obtained from the reduced Wheeler-DeWitt wave function describing spherically symmetric gravitational collapse of massless…
Gravitational Collapse and Calogero Model
Dongsu Bak, Sang Pyo Kim, Sung Ku Kim +2
We study the analytic structure of the S-matrix which is obtained from the reduced Wheeler-DeWitt wave function describing spherically symmetric gravitational collapse of massless…