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We discuss the case of massive gravitons and their relation with the cosmological constant, considered as an eigenvalue of a Sturm-Liouville problem. A variational approach with Gaussian trial wave functionals is used as a method to study…

General Relativity and Quantum Cosmology · Physics 2009-11-11 Remo Garattini

We study the effects of the Born-Infeld electrodynamics on the holographic superconductors in the background of a Schwarzschild AdS black hole spacetime. We find that the presence of Born-Infeld scale parameter decreases the critical…

General Relativity and Quantum Cosmology · Physics 2015-05-18 Jiliang Jing , Songbai Chen

We investigate the holographic superconductors in Gauss-Bonnet gravity with Born-Infeld electrodynamics. We find that the Gauss-Bonnet constant, the model parameters and the Born-Infeld coupling parameter will affect the formation of the…

General Relativity and Quantum Cosmology · Physics 2011-03-22 Jiliang Jing , Liancheng Wang , Qiyuan Pan , Songbai Chen

We investigate the neutral AdS black-hole solution in the consistent $D\rightarrow4$ Einstein-Gauss-Bonnet gravity proposed in [K. Aoki, M.A. Gorji, and S. Mukohyama, Phys. Lett. B {\bf 810}, 135843 (2020)] and construct the gravity duals…

High Energy Physics - Theory · Physics 2021-01-06 Xiongying Qiao , Liang OuYang , Dong Wang , Qiyuan Pan , Jiliang Jing

We calculate correction to the critical temperature of a dirty superconductor, which results from the local variations of the gap function near impurity sites. This correction is of the order of T_c/E_F and becomes important for…

Superconductivity · Physics 2009-10-31 M. E. Zhitomirsky , M. B. Walker

In this paper a holographic model of $s$-wave superconductor with anisotropic Lifshitz scaling has been considered. In the presence of an external magnetic field our holographic model exhibits both vortex and droplet solutions. Based on…

High Energy Physics - Theory · Physics 2015-06-19 Arindam Lala

We investigate holographic superconductors in asympototically geometries with hyperscaling violation. The mass of the scalar field decouples from the UV dimension of the dual scalar operator and can be chosen as negative as we want, without…

High Energy Physics - Theory · Physics 2015-06-15 ZhongYing Fan

In this letter, we address the impact of the electric field on superconductors which are insulators in the normal state, superconducting semiconductors at low carrier concentration and ultracold gas of fermions in the strongly interacting…

Superconductivity · Physics 2020-02-19 N. Karchev , T. Vetsov

We study Quantum Gravity effects on the density of states in statistical mechanics and its implications for the critical temperature of a Bose Einstein Condensate and fraction of bosons in its ground state. We also study the effects of…

General Relativity and Quantum Cosmology · Physics 2021-08-04 Saurya Das , Mitja Fridman

Data on macroscopic superconducting anisotropy of MgB$_2$ are reviewed. The data are described within a weak coupling two-gaps anisotropic s-wave model of superconductivity. The calculated ratio of the upper critical fields…

Superconductivity · Physics 2009-11-07 V. G. Kogan , S. L. Bud'ko

We investigate the effect of massive graviton on the holographic thermalization process. Before doing this, we first find out the generalized Vaidya-AdS solutions in the de Rham-Gabadadze-Tolley (dRGT) massive gravity by directly solving…

High Energy Physics - Theory · Physics 2016-12-30 Ya-Peng Hu , Xiao-Xiong Zeng , Hai-Qing Zhang

The combined effect of nonmagnetic and magnetic defects and impurities on critical temperatures of superconductors with different gap anisotropy is studied theoretically within the weak coupling limit of the BCS model. An expression is…

Superconductivity · Physics 2009-10-30 Leonid A. Openov

In this Letter, we consider a Non-Commutative (NC) extension of AdS-CFT correspondence and its effects on holographic superconductors. NC corrections are incorporated via the NC generalization of Schwarzschild black hole metric in AdS with…

High Energy Physics - Theory · Physics 2015-06-18 Souvik Pramanik , Sudipta Das , Subir Ghosh

We construct a gravity dual for charge density waves (CDW) in which the translational symmetry along one spatial direction is spontaneously broken. Our linear perturbation calculation on the gravity side produces the frequency dependence of…

High Energy Physics - Theory · Physics 2014-08-27 Yi Ling , Chao Niu , Jianpin Wu , Zhuoyu Xian , Hongbao Zhang

It is well known that the black hole can has temperature and radiate the particles with black body spectrum, i.e. Hawking radiation. Therefore, if the black hole is surrounded by an isolated box, there is a thermal equilibrium between the…

General Relativity and Quantum Cosmology · Physics 2017-07-26 Ya-Peng Hu , Feng Pan , Xin-Meng Wu

On the holographic complexity dual to the bulk action, we investigate the action growth for a shock wave geometry in a massive gravity theory within the Wheeler-De Witt (WDW) patch at the late time limit. For a global shock wave, the…

High Energy Physics - Theory · Physics 2018-02-13 Yan-Gang Miao , Long Zhao

We consider a holographic superconductor with homogeneous impurities added. We start with the holographic Abelian-Higgs model for s-wave superconductivity, and turn on a coupling between the gauge field and a new massive gauge field that is…

High Energy Physics - Theory · Physics 2015-06-12 Takaaki Ishii , Sang-Jin Sin

We study theoretically the effect of the fermion and boson densities on the superconductivity transition critical temperature $(T_c)$ of a two dimensional electron gas (2DEG), where superconductivity is mediated by a Bose-Einstein…

Superconductivity · Physics 2014-10-15 E. D. Cherotchenko , T. Espinosa-Ortega , A. V. Nalitov , I. A. Shelykh , A. V. Kavokin

Following previous study about AdS-Schwarzschild black holes minimally coupled to a cloud of strings in the context of massive gravity {Ghanaatian:2019} and inspired by strong connection between Gauss-Bonnet Gravity and heterotic string…

High Energy Physics - Theory · Physics 2020-01-22 Hadi Ranjbari , Mehdi Sadeghi , M. Ghanaatian , Gh. Forozani

Hydrogen-rich compounds are extensively explored as candidates for a high-temperature superconductors. Currently, the measured critical temperature of $203$ K in hydrogen sulfide (H$_3$S) is among the highest over all-known superconductors.…

Superconductivity · Physics 2016-05-05 A. P. Durajski , R. Szczesniak , L. Pietronero