60 citations · 317 across the 39 of their papers we have counts for
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Quantized Kähler Geometry and Quantum Gravity
Jungjai Lee, Hyun Seok Yang
It has been often observed that Kähler geometry is essentially a gauge theory whose field strength is identified with the Kähler form. However it has been pursued neither se…
Dark Energy and Dark Matter in Emergent Gravity
Jungjai Lee, Hyun Seok Yang
Emergent gravity can be applied to a large matrix model by considering the vacuum of a noncommutative (NC) Coulomb branch that satisfies the Heisenberg algebra. Due to the fact…
An Efficient Representation of Euclidean Gravity I
Jungjai Lee, John J. Oh, Hyun Seok Yang
We explore how the topology of spacetime fabric is encoded into the local structure of Riemannian metrics using the gauge theory formulation of Euclidean gravity. In part I, we pro…
String or branelike solutions in four-dimensional Einstein gravity in the presence of cosmological constant
Youngone Lee, Gungwon Kang, Hyeong-Chan Kim +1
We investigate string or branelike solutions for four-dimensional vacuum Einstein equations in the presence of cosmological constant. For the case of negative cosmological constant…
Classification of Hypercylindrical Spacetimes with Momentum Flow
Hyeong-Chan Kim, Gungwon Kang, Jungjai Lee +1
For the five-dimensional spacetimes whose four-dimensional sections are static, spherically symmetric () and flat asymptotically, we study the behavior of Arnowitt-Deser-Mis…
Quantum Gravity from Noncommutative Spacetime
Jungjai Lee, Hyun Seok Yang
We review a novel and authentic way to quantize gravity. This novel approach is based on the fact that Einstein gravity can be formulated in terms of a symplectic geometry rather t…
Gravity as Quantum Entanglement Force
Jae-Weon Lee, Hyeong-Chan Kim, Jungjai Lee
We conjecture that the total quantum entanglement of matter and vacuum in the universe tends to increase with time, like entropy, and that an effective force is associated with thi…
Gravity from Quantum Information
Jae-Weon Lee, Hyeong-Chan Kim, Jungjai Lee
It is suggested that the Einstein equation can be derived from Landauer's principle applied to an information erasing process at a local Rindler horizon and Jacobson's idea linking…
Is dark energy from cosmic Hawking radiation?
Jae-Weon Lee, Hyeong-Chan Kim, Jungjai Lee
It is suggested that dark energy is the energy of the Hawking radiation from a cosmic horizon. Despite of its extremely low Gibbons-Hawking temperature, this radiation could have t…
Quantum Informational Dark Energy: Dark energy from forgetting
Jae-Weon Lee, Jungjai Lee, Hyeong-Chan Kim
We suggest that dark energy has a quantum informational origin. Landauer's principle associated with the erasure of quantum information at a cosmic horizon implies the non-zero vac…
Dark energy, inflation and the cosmic coincidence problem
Jungjai Lee, Hyeong-Chan Kim, Jae-Weon Lee
We show that holographic dark energy could explain why the current dark energy density is so small, if there was an inflation with a sufficient expansion in the early universe. It…
Stationary vacuum hyper-cylindrical solution in 4+1 dimensions
Jungjai Lee, Hyeong-Chan Kim
We find a 4+1 dimensional stationary vacuum hyper-cylindrical solution solution which is spherically symmetric in dimensions and invariant under the translation along the fifth…
Dark energy from vacuum entanglement
Jae-Weon Lee, Jungjai Lee, Hyeong-Chan Kim
We suggest that vacuum entanglement energy associated with the entanglement entropy of the universe is the origin of dark energy. The observed properties of dark energy can be expl…
Cosmic D- and DF-strings from D3Dbar3: Black Strings and BPS Limit
Taekyung Kim, Yoonbai Kim, Bumseok Kyae +1
We study D- and DF-strings in a D3 system by using Dirac-Born-Infeld type action. In the presence of an electric flux from the transverse direction, we discuss gra…
Global and Local D-vortices
Yoonbai Kim, Bumseok Kyae, Jungjai Lee
Codimension-two objects on a system of brane-antibrane are studied in the context of Born-Infeld type effective field theory with a complex tachyon and U(1)U(1) gauge field…
Classical Stability of Black Branes
Gungwon Kang
Classical stability behaviors of various static black brane backgrounds under small perturbations have been summarized briefly. They include cases of black strings in AdS space…
Classical Stability of Black D3-branes
Gungwon Kang, Jungjai Lee
We have investigated the classical stability of charged black -branes in type IIB supergravity under small perturbations. For s-wave perturbations it turns out that black -…
Black Brane World from Gravitating Half -lump
Donghyun Kim, Yoonbai Kim, JungJai Lee
We study O() nonlinear -model in -dimensional curved spacetime with negative cosmological constant, and find a new -lump solution with half-integer winding and…
Brane World of Warp Geometry: An Introductory Review
Yoonbai Kim, Chong Oh Lee, Ilbong Lee +1
Basic idea of Randall-Sundrum brane world model I and II is reviewed with detailed calculation. After introducing the brane world metric with exponential warp factor, metrics of Ra…
Composite Operators and Topological Contributions in Gauge Theory
Jungjai Lee, Yeong Deok Han
In -dimensional gauge theory with a kinetic term based on the p-form tensor gauge field, we introduce a gauge invariant operator associated with the composite formed from a elec…
On Wilson Surfaces in Topological Chern-Simons Interaction in (3+1) Dimensions
JungJai Lee
We comment on the regularization of the expectation values of Wilson surfaces for the bosonic string in the (3+1) dimensions. We analyze the singular behaviors of propagator for th…