Holographic superconductor on a novel insulator

Ling, Yi; Liu, Peng; Wu, Jian-Pin; Wu, Meng-He

doi:10.1088/1674-1137/42/1/013106

Cited by 12 publications

(8 citation statements)

References 33 publications

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“…We can estimate the critical temperature for the formation of the superconducting phase by finding static normalizable modes of the scalar field ψ in the above background (3). The procedure has been used in [42][43][44][45]. This problem can be casted into a positive self-adjoint eigenvalue problem for q 2 and so we write the equation of motion for the scalar field as the following form:…”

Section: A Case I: α 1 Hd Termmentioning

confidence: 99%

Higher derivatives driven symmetry breaking in holographic superconductors

Liu

et al. 2020

Eur. Phys. J. C

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In this paper, we construct a novel holographic superconductor from higher derivative (HD) gravity involving a coupling between the complex scalar field and the Weyl tensor. This HD coupling term provides a near horizon effective mass squared, which can violates IR Breitenlohner-Freedman (BF) bound by tuning the HD coupling and induces the instability of black brane such that the superconducting phase transition happens. We also study the properties of the condensation and the conductivity in the probe limit. We find that a wider extension of the superconducting energy gap ranging from 4.6 to 10.5 may provide a novel platform to model and interpret the phenomena in the real materials of high temperature superconductor. *

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Section: A Case I: α 1 Hd Termmentioning

confidence: 99%

Higher derivatives driven symmetry breaking in holographic superconductors

Liu

et al. 2020

Eur. Phys. J. C

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“…The twocurrent coupling model has been discussed in several articles, as seen in Refs. [4][5][6][7][8][9][10][11][12][13][14][15]. In these models, one gauge field is considered the true Maxwell field, while the other serves as an auxiliary field.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Refs. [12,13] presented a novel holographic insulator and superconductor, while Ref. [14] investigated the superconducting instability by coupling the two gauge fields.…”

Section: Introductionmentioning

confidence: 99%

Geography of Technology Transfer in China

Liu

2023

East China Normal University Scientific Reports

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Graphs can model complex relationships between objects, enabling a myriad of Web applications such as online page/article classification and social recommendation. While graph neural networks (GNNs) have emerged as a powerful tool for graph representation learning, in an end-to-end supervised setting, their performance heavily relies on a large amount of task-specific supervision. To reduce labeling requirement, the "pre-train, fine-tune" and "pre-train, prompt" paradigms have become increasingly common. In particular, prompting is a popular alternative to fine-tuning in natural language processing, which is designed to narrow the gap between pre-training and downstream objectives in a task-specific manner. However, existing study of prompting on graphs is still limited, lacking a universal treatment to appeal to different downstream tasks. In this paper, we propose GraphPrompt, a novel pre-training and prompting framework on graphs. GraphPrompt not only unifies pre-training and downstream tasks into a common task template, but also employs a learnable prompt to assist a downstream task in locating the most relevant knowledge from the pre-trained model in a task-specific manner. Finally, we conduct extensive experiments on five public datasets to evaluate and analyze GraphPrompt. CCS CONCEPTS• Computing methodologies → Learning latent representations; • Information systems → Data mining.

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“…These are particularly important on the light of the conjectured duality between conformal quantum field theories on flat backgrounds and classical and quantum gravity in an anti-de Sitter space time, known under the name of AdS/CFT correspondence, [7][8][9]. It has numerous applications to QCD, condensed matter physics, hydrodynamics, superconductivity and in several cases goes beyond conformal field theories, [10][11][12][13][14][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

De sitter magnetic black hole dipole with a supersymmetric horizon

Cacciatori

Astesiano

2021

J. High Energ. Phys.

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We find a new non BPS solution in N = 2 D = 4 gauged supergravity coupled to U(1) gauge fields and matter. It consists in a closed universe with two extremal black holes of equal size, surrounding two singularities. They have opposite magnetic charges (and no electric charges), but stay in static equilibrium thanks to the positive pressure of a cosmological constant. The geometry is perfectly symmetric under the exchange of the black holes and the flip of the sign of the charges. However the scalar field is non constant and non symmetric, with different values at the horizons, which depend on a real modulus. Remarkably we show that it satisfies the attractor mechanism and the entropy indeed depends only on the magnetic charges. At one of the horizons the solution becomes $$ \frac{1}{2} $$ 1 2 -BPS supersymmetric, while at the other one there is no supersymmetry, but the entropy remains independent from the scalar modulus.

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Holographic superconductor on a novel insulator

Cited by 12 publications

References 33 publications

Higher derivatives driven symmetry breaking in holographic superconductors

Higher derivatives driven symmetry breaking in holographic superconductors

Geography of Technology Transfer in China

De sitter magnetic black hole dipole with a supersymmetric horizon

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