Article
Physics, Particles & Fields
Aristomenis Donos, Christiana Pantelidou, Vaios Ziogas
Summary: In this study, holography was utilized to derive effective theories of fluctuations in spontaneously broken phases, with a focus on systems with finite temperature, chemical potential, magnetic field, and momentum relaxation where translations are broken. The hydrodynamic modes corresponding to coupled thermoelectric and density wave fluctuations were analytically constructed, revealing them to be purely diffusive in the system. Introduction of pinning for density waves resulted in some modes acquiring not only a gap, but also a finite resonance due to the presence of a magnetic field. Optical properties were studied and numerical checks of the analytical results were performed. An important outcome of the analysis was the identification of the correct current responsible for heat transport in the system.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Carlo Ewerz, Andreas Samberg, Paul Wittmer
Summary: In this study, holography was utilized to investigate the dynamics of a vortex-anti-vortex dipole in a strongly coupled superfluid in 2+1 dimensions. Numerical real-time simulations were used to track the evolution of vortices as they approached and annihilated each other. Universal trajectories of vortices were identified, while non-universal effects were attributed to numerical artifacts in vortex initialization. Additionally, the dependence of dynamics on superfluid temperature was explored.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Javier Mas, David Travieso Mayo
Summary: This article revisits the case of a real scalar field in global AdS4 under periodic driving. The authors address the issue of adiabatic preparation and deformation of a time-periodic solution corresponding to a Floquet condensate. They carefully study the case of driving close to the normal mode resonant frequencies and examine different slow protocols. The results show that traversing a normal mode frequency has different consequences depending on the sense of the frequency modulation.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Jinwei Chu, Feiyu Deng, Yang Zhou
Summary: The study defines defect extremal surface by minimizing the Ryu-Takayanagi surface corrected by the quantum theory localized on the defect, and extends the results to higher dimensions. It is found that the entropy computed from bulk defect extremal surface is generally less than that from island formula in boundary low energy effective theory, suggesting a smaller entropy from the UV completion of island formula.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Wen-Bin Pan, Ya-Wen Sun
Summary: This paper investigates the method of generating topologically nontrivial gapless hydrodynamic modes in holographic systems and compares it with the approach used in relativistic hydrodynamics. The study is also extended to the case with one extra U(1) current, revealing the possibility of more complex topological phase diagrams.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Jeong-Won Seo, Taewon Yuk, Young-Kwon Han, Sang-Jin Sin
Summary: In this study, a model with a flat band over a finite region of momentum space is proposed using a bulk interaction term instead of a boundary term. The spectrum of the model is found to be precisely analogous to that of the ABC stacked multilayer graphene. Furthermore, the flat band in the holographic model is bent in the presence of the chemical potential, resembling the band deformation due to spin-orbit interaction.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Zhi Wang, Zekun Xu, Shuyan Zhou, Yang Zhou
Summary: This study investigates the AdS region using the partial reduction method, exploring the relationship between defect extremal surfaces and entropy in boundary CFT. It also demonstrates the existence of a 4-dimensional massless graviton on an AdS(4) brane under partial reduction.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Yu-Ni Yang, Chuan-Yin Xia, Zhang-Yu Nie, Hua-Bi Zeng
Summary: In this study, we investigate the competition between the p-wave and the p+ip superfluid solutions by applying magnetic field intensity H and back reaction parameter b. We find that the p+ip solution is significantly affected while the p-wave solution is only slightly affected when H is turned on. The H-T phase diagrams reveal a slit region of the p+ip phase, with the zero (or finite) value of H at the starting point of the slit region related to second (or first) order p-wave phase transition at zero magnetic intensity, which is expected to be universal in systems with degenerate critical points at zero magnetic field.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Ronnie Rodgers, Enea Mauri, Umut Gursoy, Henk T. C. Stoof
Summary: The study focuses on various thermodynamic and transport properties of a holographic model of a nodal line semimetal at finite temperature, including the quantum phase transition and the disappearance of nodal lines as temperature increases. By introducing a new nonlinear coupling, the low frequency limit of electrical conductivity can be controlled to better match the real NLSMs. The anisotropy of the boundary quantum field theory leads to explicitly broken Lorentz invariance, impacting the stress tensor and thermal conductivity.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Peng Yang, Xin Li, Yu Tian
Summary: The instability of superfluids in optical lattice was investigated using a holographic model. Numerical solutions for static and steady flow were obtained, and the instability was studied at both linear perturbation and fully nonlinear levels. The results showed a chaotic state with soliton generation before eventually settling into a stable state.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Debabrata Ghorai, Taewon Yuk, Sang-Jin Sin
Summary: In this study, we investigate the fermionic spectral function in p-wave holographic superconductors. We find that the vector model with minimal coupling exhibits a p-wave spectral function with Fermi arc, in contrast to previous studies where the p-wave arc was shown in the presence of a tensor field. We examine the momentum-dependent order parameter, the omega-gap in the real part of the conductivity, and the impact of coupling constants, temperature, and chemical potential on the spectral function.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Debabrata Ghorai, Yoon-Seok Choun, Sang-Jin Sin
Summary: In this paper, we reevaluate the angular dependence in gap structure of holographic superconductors and analyze the vector field model and scalar order model in detail. Some interesting conclusions are drawn, including the comparison of critical temperature between the two models.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Chong-Ye Chen, Wei Xiong, Chao Niu, Cheng-Yong Zhang, Peng Liu
Summary: In the study of holographic Aether gravity theory, it is found that the entanglement wedge cross-section (EWCS) exhibits rich non-monotonic behaviors, while the holographic entanglement entropy (HEE) and the corresponding mutual information (MI) only display monotonic behaviors. This suggests that the EWCS may capture more diverse entanglement content than the HEE and the MI, and the role of Lorentz violation in determining the behaviors of quantum information-related quantities is analyzed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Zhi-Hong Li, Han-Qing Shi, Hai-Qing Zhang
Summary: We investigate the formation of topological defects during the dynamical phase transition in a ring using the AdS/CFT correspondence. The results show that the configurations of the order parameter phases and correlation functions vary with different boundary conditions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Shuta Ishigaki, Shunichiro Kinoshita, Masataka Matsumoto
Summary: In this study, the dynamical stability of a holographic conductor with a constant current under an external electric field is analyzed. The focus is on the stability in the parameter region where the multivalued relation between the external electric field and the current occurs due to nonlinear conductivity. The analysis shows that the states in one branch with a low electric current can be dynamically unstable, and the perturbations around the unstable states can become stable with finite wavenumber, indicating the existence of inhomogeneous steady states with current filaments.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Yuta Hamada, Elias Kiritsis, Francesco Nitti
Summary: In this study, a general class of holographic theories with a nontrivial theta-angle were analyzed, showing that the slopes of glueball masses differ in different potentials, and in the case of steep dilaton potentials, the glueball masses may turn negative before reaching the maximum of aUV. This could indicate favored instanton condensation in the bulk. The study also investigated strong CP-violation in the effective glueball action.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2021)
Article
Physics, Particles & Fields
P. Betzios, E. Kiritsis, V. Niarchos
Summary: This study investigates a new type of gravitational theory, revealing the association between gravitons and the energy-momentum tensor, deriving an effective description of the dynamics, and exploring the interaction between hidden theories and gravity coupled to the Standard Model. The resulting emergent gravitational theory is a bi-gravity theory, connecting hidden theories with holography.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Daniel Arean, Richard A. Davison, Blaise Gouteraux, Kenta Suzuki
Summary: Hydrodynamics breaks down near a quantum critical point, with affected dynamics being influenced by critical point properties. The local equilibration time is determined by the infrared properties of the theory, while the absolute values of frequency and wave vector at the collision provide a natural characterization of all diffusion properties of low-temperature states.
Article
Physics, Particles & Fields
Jewel K. Ghosh, Elias Kiritsis, Francesco Nitti, Lukas T. Witkowski
Summary: The study examines Coleman-de Luccia processes for AdS to AdS decays in Einstein-scalar theories, interpreting these tunneling processes as vev-driven holographic RG flows of a quantum field theory on de Sitter space-time. The existence of Coleman-de Luccia tunneling solutions in potentials with false AdS vacua is found to be tied to the presence of exotic RG flows in the same potentials. Additionally, it is argued that even when such instantons exist, they do not imply an instability of the same theory on flat space or on R x S-3.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
P. Betzios, E. Kiritsis, O. Papadoulaki
Summary: We studied a class of tripartite systems where two d-dimensional quantum field theories are cross-coupled via a third d+1-dimensional messenger quantum field theory. We analyzed in detail a specific example of one-dimensional matrix quantum mechanics coupled with a two-dimensional BF-type theory and computed their partition function and correlators. This construction can be extended to higher dimensions using a Chern-Simons messenger theory. In all such examples, the exact partition function takes a form speculated to correspond to systems dual to Euclidean wormholes, and the cross correlators exhibit soft behavior consistent with analogous gravitational calculations. We also studied another variant of the tripartite system, where the messenger theory is described by a non-self-interacting (matrix) field, reaching similar conclusions. While the Euclidean theories we considered are perfectly consistent, the two possible analytic continuations into Lorentzian signature of the tripartite models reveal physical features and pathologies resembling those of expected Lorentzian gravitational backgrounds.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Luca Delacretaz, Blaise Gouteraux, Vaios Ziogas
Summary: The article discusses the existence of approximate symmetries in nature and their spontaneous breaking. By studying hydrodynamics, the authors show that the damping of pseudo-Goldstones is solely determined by their mass and diffusive transport coefficients. The article also presents various applications and explores the similarities between the damping phenomena in electronic density wave phases and the behavior of strange metal high-Tc superconductors.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Particles & Fields
Niko Jokela, Jani Kastikainen, Elias Kiritsis, Francesco Nitti
Summary: In this study, we investigate strongly coupled ABJM theory with massive quenched flavor on the 3-sphere using the AdS/CFT correspondence. We find a quantum phase transition in the theory on the 3-sphere at a critical value of the sphere radius, which corresponds to a topology change in the D6-brane embeddings and is interpreted as the meson-melting transition. Additionally, we observe that the F-functions of the flavored ABJM theory are not monotonic, which we speculate is related to the presence of the phase transition.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Pascal Anastasopoulos, Elias Kiritsis
Summary: The study explores the role of fermionic bound states (mesinos) of messengers as right-handed neutrinos in realizing the seesaw mechanism. By analyzing simple models with single and three mesino states, it is demonstrated that both light and heavy sterile neutrinos can be obtained through the seesaw mechanism.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
A. Ghodsi, J. K. Ghosh, E. Kiritsis, F. Nitti, V Nourry
Summary: We discuss three related topics: (a) Holographic quantum field theories on AdS spaces. (b) Holographic interfaces of flat space QFTs. (c) Wormholes connecting generically different QFTs. In a specific example, we investigate how classical solutions explore the space of QFTs and construct general solutions that interpolate between the same or different CFTs with arbitrary couplings. The solution space contains exotic flow solutions that realize unusual asymptotics as boundaries of different regions in the solution space. We find phenomena like walking flows and the generation of extra boundaries via flow fragmentation.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
E. Kiritsis, C. Litos
Summary: In this study, holographic RG flows dual to QFTs on a squashed S-3 in the framework of Einstein dilaton gravity in four dimensions are considered. A general dilaton potential is utilized and the flows are driven by a scalar relevant operator. The general properties of such flows are analyzed and the UV and IR asymptotics are computed, revealing exotic asymptotics different from the standard Fefferman-Graham asymptotics.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
M. Jarvinen, E. Kiritsis, F. Nitti, E. Preau
Summary: The structure of the five-dimensional Tachyon-Chern-Simons action and its relevance to single-baryon states in the context of the V-QCD models for holographic QCD with backreacting flavor are analyzed. The most general form of the Tachyon-Chern-Simons 5-form is determined and it is shown to reproduce the flavor anomalies. Single-baryon solutions of the gravity theory are considered, where the baryon is realized as a bulk axial instanton. The boundary conditions are derived to ensure finite boundary energy and unit baryon charge, and the boundary baryon number is shown to coincide with the bulk axial instanton number.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Pascal Anastasopoulos, Kunio Kaneta, Elias Kiritsis, Yann Mambrini
Summary: We investigate the impact of an anomalous Z' boson on the anomalous magnetic moment of the muon (g - 2), focusing on its axial coupling. We analyze the negative contribution of such couplings at one-loop and examine the anomalous couplings generated at two loops. Our findings reveal parameter spaces where the anomalous contribution becomes comparable or dominant to the one-loop contribution. We demonstrate that in such cases, the theory's cutoff is sufficiently low to allow for the detection of new charged fermions in future collider experiments. We also discuss the implications of this scenario in orientifolds of string theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Blaise Gouteraux, Filippo Sottovia, Eric Mefford
Summary: This work studies the linear stability of superfluid phases of matter and discovers the origins of instabilities. It also discusses the applications of these findings in different scenarios.
Article
Physics, Multidisciplinary
Nikolaos Angelinos, Elias Kiritsis, Francisco Pena-Benitez
Summary: The scaling of the AC conductivity in quantum critical holographic theories at finite density, finite temperature, and in the presence of momentum dissipation shows a clear intermediate window of frequencies where the IR scaling of the AC conductivity is visible.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Multidisciplinary
Yuta Hamada, Elias Kiritsis, Francesco Nitti, Lukas T. Witkowski
Summary: The proposed brane-world setup allows for the self-tuning of the cosmological constant and stabilization of the electroweak hierarchy by introducing a bulk axion, leading to multiple static solutions with different equilibrium positions for the brane. The model can exhibit electroweak symmetry breaking with a small Higgs mass, regardless of the explicit dependence on the bulk axion in the brane theory. The realization of self-tuning of the cosmological constant is efficient and the generation of solutions with a hierarchy is a robust feature due to the expected dependence of the brane action on the axion.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2021)
