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10 papers · 1 filter
Trans-Planckian Physics and Non-Commutative Inflation
Seoktae Koh
Non-commutativity of spacetime at the Planck scale may deform the usual dispersion relations. And these deformed dispersion relations could lead to the accelerating phase without a…
Dense Holographic QCD in the Wigner-Seitz Approximation
Keun-Young Kim, Sang-Jin Sin, Ismail Zahed
We investigate cold dense matter in the context of Sakai and Sugimoto's holographic model of QCD in the Wigner-Seitz approximation. In bulk, baryons are treated as instantons on S^…
Exact solutions of embedding the four-dimensional perfect fluid in a five- or higher-dimensional Einstein spacetime and the cosmological interpretations
Jie Ren, Xin-He Meng, Liu Zhao
We investigate an exact solution that describes the embedding of the four-dimensional (4D) perfect fluid in a five-dimensional (5D) Einstein spacetime. The effective metric of the…
Dynamics of false vacuum bubbles with nonminimal coupling
Bum-Hoon Lee, Chul H. Lee, Wonwoo Lee +2
We study the dynamics of false vacuum bubbles. A nonminimally coupled scalar field gives rise to the effect of negative tension. The mass of a false vacuum bubble from outside obse…
Baryon-charge Chemical Potential in AdS/CFT
Shin Nakamura, Yunseok Seo, Sang-Jin Sin +1
We present a closed framework of AdS/CFT with finite U(1)B-charge chemical potential. We show how the gauge-invariant identification of the chemical potential with the bulk gauge f…
Diffusion in an Expanding Plasma using AdS/CFT
Keun-Young Kim, Sang-Jin Sin, Ismail Zahed
We consider the diffusion of a non-relativistic heavy quark of fixed mass M, in a one-dimensionally expanding and strongly coupled plasma using the AdS/CFT duality. The Green's fun…