Browsing by Author "Wen, Wen-Yu"

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Black hole remnant in asymptotic anti-de Sitter space
(2015-12-21)
Wen, Wen-Yu
;
Wu, Shang-Yu
;
電子物理學系
;
Department of Electrophysics
The solution of a remnant was suggested for the black hole ground state after surface gravity is corrected for the loop quantum effect. On the other hand, a Schwarzschild black hole in asymptotic anti-de Sitter space would tunnel into the thermal soliton solution known as the Hawking-Page phase transition. In this letter, we investigate the low temperature phase of a three-dimensional Banados-Teitelboim-Zanelli (BTZ) black hole and four-dimensional AdS Schwarzschild black hole. We find that the thermal soliton is energetically favored rather than the remnant solution at low temperature in three dimensions, while a Planck-size remnant is still possible in four dimensions. Though the BTZ remnant seems energetically disfavored, we argue that it is still possible to find in the overcooled phase if strings were present, and its implication is discussed.
Dipole coupling effect of holographic fermion in charged dilatonic gravity
(2012-06-06)
Wen, Wen-Yu
;
Wu, Shang-Yu
;
物理研究所
;
Institute of Physics
In this Letter, we study the dipole coupling effect of holographic fermion in a charged dilatonic black hole proposed by Gubser and Rocha (2010) [1]. It is found that the property of Fermi liquid is rigid under perturbation of dipole coupling, and the Fermi momentum is linearly shifted. A gap is dynamically generated as the coupling becomes large enough and the Fermi surface ceases to exist as the bulk dipole coupling further increases. (C) 2012 Elsevier B.V. All rights reserved.
Holographic model of a two-band superconductor
(2014-03-11)
Wen, Wen-Yu
;
Wu, Mu-Sheng
;
Wu, Shang-Yu
;
物理研究所
;
丘成桐中心
We construct a holographic two-band superconductor model with interband Josephson coupling. We investigate the effects the Josephson coupling has on the superconducting condensates and the critical temperature for their formation numerically, as well as analytically where possible. We calculate the ac conductivity and find it qualitatively similar to the single band superconductor. We investigate the nodal structure of our holographic two-band superconductor from the low temperature behavior of the thermal conductivity and find it nodeless.