Article
Energy & Fuels
Chen-Chen Wang, Yong-Fei Yang, Deng-Lin Han, Miao-Miao Su, Rong-Rong Hu
Summary: It is important to study the influence of matrix physical properties on flow characteristics in tight oil formations. Researchers constructed digital rock samples of fractures and matrix with micro-CT scanning and extracted corresponding pore networks. They found that the matrix system contributes more to the porosity of the dual media and less to the permeability. By adjusting matrix pore density and filling domain factor, they observed changes in the porosity and permeability of the dual media. The results can be used to explain the flow patterns in dual-media during tight oil production.
Article
Astronomy & Astrophysics
Ki-Seok Kim, Shinsei Ryu, Kanghoon Lee
Summary: In holographic duality, a theory framework that describes the renormalization group flow of a quantum field theory by introducing additional dimensions, we develop a new holographic description that encodes the information of the renormalization group flow and the quantum field theory into an effective field theory. We demonstrate the self-consistency of this dual construction under the assumption of bulk locality.
Article
Physics, Mathematical
Ismail Aymaz, Mustafa Emre Kansu
Summary: This paper presents a generalized description of electromagnetism and linear gravity based on combined dual numbers and complex quaternion algebra. The electromagnetic and gravitational fields are considered as components of one combined dual-complex quaternionic field, with all relations between potentials, field strengths and sources formulated in compact quaternionic differential equations. The alternative reformulation of gravitoelectromagnetism equations using 8 x 8 matrix formalism is also discussed, indicating the similarity and isomorphism of distinctive algebraic structures.
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Siruo Zhang, Huijun Kang, Min Cheng, Yihui Jiang, Fei Cao, Enyu Guo, Zongning Chen, Shuhua Liang, Tongmin Wang
Summary: This study investigates the electrical sliding wear behavior of dual-scale particulate reinforced copper matrix composites. The results suggest that both mechanical wear and electrical wear dominate the wear process, with increasing electrical current leading to higher wear loss but reduced friction coefficient fluctuations. The introduction of Cr element and ZrB2 particles decreases the wear rate and adhesive wear and abrasive wear play important roles in the wear mechanism under electrical current.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Electrical & Electronic
Zou Zhuoyang, Wu Bin, Huang Tiantian, Song Kaichen
Summary: This paper introduces a dual-sensor system and a corresponding data processing algorithm for underwater gravity measurement. The system uses electrostatic suspended accelerometers and rotary modulation inertial measurement units to combine the advantages of both sensors and output low-drift and accurate gravity values. The performance of the algorithm is validated through simulation and real-world experiments.
IEEE SENSORS JOURNAL
(2022)
Article
Astronomy & Astrophysics
Nils A. Nilsson
Summary: In this study, we investigate the effects of explicit spacetime-symmetry breaking on primordial tensor fluctuations using an effective-field theory for Lorentz/CPT violation. Our findings show that despite the symmetry breaking, the graviton remains massless, but the propagation speed of tensor modes is modified. We also derive a constraint on the coefficient determining the symmetry breaking based on recent measurements of the speed of gravity. Additionally, due to the symmetry breaking, the de-Sitter phase is altered, resulting in a slow oscillation of the power spectrum during the inflationary epoch. Furthermore, we observe that while the primordial tensor power spectrum maintains scale invariance, its amplitude is modified. Moreover, we find that the modes which become subhorizon during radiation domination experience a phase shift proportional to the coefficient for Lorentz violation.
Article
Physics, Particles & Fields
Alexander Gorsky, Vladimir Kazakov, Fedor Levkovich-Maslyuk, Victor Mishnyakov
Summary: Using the matrix-forest theorem and Parisi-Sourlas trick, we solve a one-matrix model with non-polynomial potential, providing a perturbation theory for massive spinless fermions on dynamical planar graphs. This model is a lattice version of 2d quantum gravity coupled to massive spinless fermions, and it equivalently describes the ensemble of spanning forests on the same graphs. The solution is formulated in terms of an elliptic curve. We focus on a near-critical scaling limit, obtaining one-point scaling functions parameterized by the Lambert function.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Guangze Chen, Fei Song, Jose L. Lado
Summary: The computation of spectral functions in a non-Hermitian many-body system is a challenging task, but this article proposes a numerical approach to address this problem. By utilizing the kernel polynomial method and the matrix-product state formalism, the local spectral functions of a non-Hermitian many-body Hamiltonian can be efficiently computed. The results demonstrate that the algorithm accurately captures the topological spin excitations and line gap topology in non-Hermitian spin models, even in the presence of the non-Hermitian skin effect.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Chemical
Petr Kovar, Michal Smolen, Jan Pagac, Marek Kincl, Zdenek Slouka
Summary: Electrodialysis and electrodeionization use ion-exchange membranes and an applied DC electric field to separate ionic components from water solutions. The concentration of ions changes along the channels due to ion separation and concentration polarization at the membranes. A milifluidic cell was constructed to measure concentration profiles under single-path electrodialysis conditions. The desalination of a NaCl solution showed different concentration profiles at different current densities.
Article
Astronomy & Astrophysics
Mahdi Godazgar, Simon Guisset
Summary: This article applies the recent derivations of dual charges in asymptotically flat spacetimes to asymptotically locally anti-de Sitter (AdS) spacetimes. It finds that the dual charge contribution vanishes in the AdS case with a Dirichlet boundary, but is nonvanishing and corresponds to the NUT parameter in the Taub-NUT-AdS solution.
Article
Physics, Particles & Fields
Dionysios Anninos, Beatrix Muhlmann
Summary: This study focuses on the genus expansion of the gravitational path integral in two-dimensional spacetime with a positive cosmological constant, demonstrating an exponential growth of OPE coefficients and establishing a connection between matrix and gravity perspectives. The results provide a possible path towards a microscopic picture of a two-dimensional de Sitter universe.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Mathematics
Jianke Qiang, Jing Xu, Kai Lu, Zhenwei Guo
Summary: This paper proposes an efficient 3D forward modeling and inversion method for gravity data. The gravity field from each horizontal layer is calculated using the fast Fourier transform (FFT) method and the Block Toeplitz with Toeplitz Blocks (BTTB) matrix, greatly reducing computation time and storage requirement. The observed gravity data are separated into multiple gravity components of different depths and an iterative method is used to adjust the model to fit these components.
Article
Astronomy & Astrophysics
Suvankar Dutta, Taniya Mandal, Sanhita Parihar
Summary: This paper discusses two different approaches to synthesize holographic nonrelativistic fluid from its relativistic counterpart. In the first approach, the nonrelativistic fluid is obtained by light-cone reduction of a relativistic conformal fluid. In the second approach, the bulk dual of the relativistic fluid is considered, and TsT transformations are performed on the bulk solution to change the asymptotic structure. The nonrelativistic fluids obtained by these two methods are shown to be equivalent up to second order in derivative expansion, providing explicit expressions for different constitutive relations and transports of holographic U(1) charged nonrelativistic fluids (both parity odd and even) up to second order in derivative expansion.
Article
Physics, Particles & Fields
Ping Gao, Daniel L. Jafferis, David K. Kolchmeyer
Summary: We study the dynamics of dynamical end of the world branes in Jackiw-Teitelboim gravity in nearly AdS(2) spacetimes. By quantizing the theory and calculating the Euclidean path integral summation over topologies, including dynamical branes, we find a perfect match with a modified SSS matrix model. Resolving UV divergences in the gravitational instantons involving branes allows for a Wilsonian effective theory interpretation of the gravitational theory. By extending the integration contour of eigenvalues into the complex plane, we complete the nonperturbative version of the modified SSS matrix model and provide a new interpretation of other phases in such matrix models. Additionally, we derive an effective W(Phi) dilaton gravity with similar semiclassical physics, where the extremal entropy of a large number of flavors of branes counts the states of these branes.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jack S. Baker, David R. Bowler
Summary: By engraving trenches on the surfaces of ultrathin ferroelectric films, control over the orientation of FE domain walls can be achieved, allowing them to function as useful nanocircuits. Through large scale density functional theory simulations, the mechanism responsible for parallel alignment of domain walls and surface trenches has been explored, showing how it can be explained by the arrangement of electric dipole moments.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Particles & Fields
Bartlomiej Czech, Lampros Lamprou, Samuel McCandlish, James Sully
JOURNAL OF HIGH ENERGY PHYSICS
(2016)
Article
Physics, Particles & Fields
Bartlomiej Czech, Lampros Lamprou, Samuel McCandlish, Benjamin Mosk, James Sully
JOURNAL OF HIGH ENERGY PHYSICS
(2016)
Article
Physics, Particles & Fields
Bartlomiej Czech, Phuc H. Nguyen, Sivaramakrishnan Swaminathan
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Particles & Fields
Vijay Balasubramanian, Ben Craps, Bartlomiej Czech, Gabor Sarosi
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Particles & Fields
Bartlomiej Czech, Lampros Lamprou, Samuel McCandlish, Benjamin Mosk, James Sully
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Multidisciplinary
Bartlomiej Czech
PHYSICAL REVIEW LETTERS
(2018)
Article
Physics, Multidisciplinary
Bartlomiej Czech, Lampros Lamprou, Samuel McCandlish, James Sully
PHYSICAL REVIEW LETTERS
(2018)
Article
Physics, Particles & Fields
Bartlomiej Czech, Xi Dong
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Bartlomiej Czech, Jan de Boer, Dongsheng Ge, Lampros Lamprou
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Bartlomiej Czech, Yaithd D. Olivas, Zi-zhi Wang
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Review
Physics, Multidisciplinary
Bowen Chen, Bartlomiej Czech, Zi-Zhi Wang
Summary: In this paper, we provide a pedagogical review of the application of concepts from quantum information theory and gravitational theory in the anti-de Sitter/conformal field theory correspondence. We introduce various concepts and techniques, and aim to give researchers a working knowledge in this field for initiating original projects.
REPORTS ON PROGRESS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Bartlomiej Czech, Sirui Shuai
Summary: The holographic entropy cone is used to identify entanglement entropies of field theory regions. This study points out that average entropies of p-partite subsystems can be similarly analyzed for arbitrarily many regions. It is conjectured that the holographic cone of average entropies is simplicial and combines features of perfect tensor and bipartite entanglement.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Particles & Fields
Bartlomiej Czech, Yunfei Wang
Summary: In holographic duality, semiclassical bulk duals of boundary states are subject to inequalities that restrict the von Neumann entropies of their subsystems. Existing inequalities only apply to up to N = 5 disjoint subsystems, but we have discovered a new inequality involving N = 7 disjoint regions. Our findings support a recent conjecture on the structure of holographic inequalities and provide insights into the potential for further exploration using similar tactics.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Bowen Chen, Bartlomiej Czech, Zi-zhi Wang
Summary: The study represents the vacuum of a two-dimensional conformal field theory as a network of Wilson lines in SL(2, R) x SL(2, R) Chern-Simons theory, and explores the relationship between the structure of the network and the curvature of the cutoff surface. The results suggest that the density of complexity of the network is related to the position and shape of the cutoff scale.
Article
Materials Science, Multidisciplinary
Bartlomiej Czech, Glen Evenbly, Lampros Lamprou, Samuel McCandlish, Xiao-liang Qi, James Sully, Guifre Vidal