60 citations · 317 across the 39 of their papers we have counts for
12 papers · 1 filter
Holographic dark energy in Einstein-Cartan spin cosmology
Yongjun Yun, Jungjai Lee
We show that, in Einstein-Cartan theory, the torsion scalar modifies the dust-like equation of state of non-interacting holographic dark energy with the Hubble radius as the infrar…
Dynamical Resolution of the Cosmic Coincidence Problem in Non-Interacting Holographic Dark Energy via Einstein-Cartan Torsion
Yongjun Yun, Kyungduk Kim, Jungjai Lee
We investigate the cosmic coincidence problem in non-interacting holographic dark energy with the Hubble radius as the infrared cutoff in Einstein-Cartan gravity. In general relati…
Holographic Dark Energy with Hubble Radius as an Infrared Cutoff in Einstein-Cartan Gravity
Yongjun Yun, Jungjai Lee
In this work, we investigate non-interacting holographic dark energy (HDE) with the Hubble radius as the infrared cutoff in Einstein-Cartan gravity. We derive the Einstein-Cartan e…
Non-interacting holographic dark energy with Torsion via Hubble Radius
Yongjun Yun, Jungjai Lee
We reconstruct a holographic dark energy model within a Friedmann cosmology incorporating torsion scalar, assuming no interaction between dark energy and dark matter. Setting the H…
Holographic Dark Energy with Torsion
Yongjun Yun, Jungjai Lee
We consider the holographic dark energy model with axial torsion which satisfy the cosmological principle. Subsequently, by using the torsional analogues of Friedmann equations for…
N=2 PNGB Quintessence Dark Energy
Keunsu Cheon, Jungjai Lee
In this paper we show that a pseudo-Nambu-Goldstone boson (PNGB) quintessence of spontaneous symmetry breaking (SSB) is responsible for an epoch of the late time cosmic acceleratio…
Holographic Dark Energy and Quantum Entanglement
Jae-Weon Lee, Hyeong-Chan Kim, Jungjai Lee
In this paper, we briefly review the holographic dark energy model and introduce the idea that dark energy is a kind of thermal energy related to the quantum entanglement of the va…
Causality Problem in a Holographic Dark Energy Model
Hyeong-Chan Kim, Jae-Weon Lee, Jungjai Lee
In the model of holographic dark energy, there is a notorious problem of circular reasoning between the introduction of future event horizon and the accelerating expansion of the u…
Cosmological Imprint of the Second Law of Thermodynamics
Hyeong-Chan Kim, Jae-Weon Lee, Jungjai Lee
We study the evolution of the universe in the presence of inflaton, matter, radiation, and holographic dark energy. The time evolution of the scale factor is obtained by solving th…
Geometrical properties of the trans-spherical solutions in higher dimensions
Gungwon Kang, Hyeong-Chan Kim, Jungjai Lee
We investigate the geometrical properties of static vacuum -brane solutions of Einstein gravity in dimensions, which have spherical symmetry of orthogonal to…
Extraordinary vacuum black string solutions
Hyeong-Chan Kim, Jungjai Lee
In addition to the boosted static solution there are two other classes of stationary string-like solutions of the vacuum Einstein equation in (4+1)-dimensions. Each class is charac…
Black string and velocity frame dragging
Jungjai Lee, Hyeong-Chan Kim
We investigate velocity frame dragging with the boosted Schwarzschild black string solution and the boosted Kaluza-Klein bubble solution, in which a translational symmetry along th…