Article
Astronomy & Astrophysics
Yao Ji, Alexander Manashov, Sven-Olaf Moch
Summary: This article studies the symmetry and transformation of the evolution kernels of generalized parton distributions, showing that quantum effects lead to differences between the symmetry generators and the canonical ones. By constructing a transformation that brings the symmetry generators back to their canonical form, it is demonstrated that the eigenvalues of the new canonically invariant evolution kernel coincide with the parity-respecting anomalous dimensions.
Review
Physics, Multidisciplinary
Yvonne Geyer, Lionel Mason
Summary: This passage introduces chiral string theories starting from Witten's twistor string, which describe field theory amplitudes without the towers of massive states found in conventional strings. These theories, known as ambitwistor strings, provide compact formulas for tree-level amplitudes and loop integrands through correlators. The passage discusses the two incarnations of ambitwistor string and their applications, as well as connections to conventional strings and celestial holography.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Optics
Ping-Sheng Xue, Qiang Liu, Qiang Wu, Yongqing Fu
Summary: The transmission characteristics of the Sagnac fiber loop interferometer, which consists of two sections of polarization-maintaining fiber (PMF) spliced at different offset angles, have been analyzed. An application for twist measurement using PMFs spliced at different offset angles has been designed based on the simulation results. By changing the offset angle of the PMFs, the measurement range and sensitivity can be adjusted, and the sensitivity of the system has been improved.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Particles & Fields
E. Rubin de Celis, C. Simeone
Summary: This study investigates the possibility of traversing thin shells, focusing on the variation in tides associated with different global properties of the geometries. It was found that the previously problematic curvature jumps across infinitely thin shells can be significantly reduced or even eliminated in shells joining an inner with an outer submanifold of spacetimes with one asymptotic region. It is also shown that cylindrical shells have an advantage over spherical shells within this framework.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
Seung-Joo Lee, Wolfgang Lerche, Guglielmo Lockhart, Timo Weigand
Summary: The research investigates the connection between enumerative geometry of Calabi-Yau fourfolds with fluxes and the modularity of elliptic genera in four-dimensional string theories. It suggests that certain contributions to the elliptic genus are given by derivatives of modular or quasi-modular forms, resulting in a quasi-Jacobi form. The diverse mathematical ingredients, including algebraic geometry of fourfolds and relative Gromow-Witten theory, conspire in a unique way required by stringy consistency.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Faizuddin Ahmed
Summary: In this research, we focus on a specific category of traversable wormholes known as topologically charged generalized Schwarzschild-Simpson-Visser-type wormholes. The energy-momentum tensor associated with this wormhole complies with both the weak energy condition (WEC) and the null energy condition (NEC). The inclusion of global monopole charge significantly affects the curvature properties of the wormhole space-time and other derived physical quantities.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Surgery
Rod J. Rohrich, Paul D. Durand
Summary: The spreader flap technique offers an alternative to traditional spreader grafts for reconstructing the dorsal midvault and preserving internal valve function. This four-step technique provides a simple and reproducible method for shaping the dorsal midvault while maintaining internal valve function.
PLASTIC AND RECONSTRUCTIVE SURGERY
(2021)
Article
Physics, Particles & Fields
Yun Soo Myung
Summary: The stability of Schwarzschild-AdS black holes in Einstein-Weyl-scalar theory is investigated, with a quadratic scalar coupling to the Weyl term. Two instabilities, namely Gregory-Laflamme and tachyonic instabilities, are found in this theory.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
B. A. Kniehl, V. N. Velizhanin
Summary: In this study, the non-planar contribution to the universal anomalous dimension of twist-two operators in N = 4 supersymmetric Yang-Mills theory at four loops through Lorentz spin eighteen was computed and a general expression valid for arbitrary Lorentz spin was reconstructed based on the results of previous calculations and recent analytic results. Various properties of this general result were studied, including its large-spin limit and small-x limit, and a prediction for the non-planar contribution to the anomalous dimension of the single-magnon operator in the beta-deformed version of the theory was presented.
Article
Chemistry, Physical
Tian-Yu Sun, Kai Chen, Qihui Lin, Tingting You, Penggang Yin
Summary: The reaction pattern of hypervalent iodine reagents involves hypervalent twist followed by reductive elimination, and studying the mechanism of hypervalent twist can guide experiments effectively. Previous research has identified two types of hypervalent twist models, namely apical twist and equatorial twist. This study successfully identified Togni II's isomerization pathway via equatorial twist, suggesting that different hypervalent twist models should be considered to predict the correct reaction mechanisms.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Astronomy & Astrophysics
Marco S. Bianchi
Summary: This article explores the three-point functions of spin-two twist-two operators in N = 4 SYM, providing perturbative data up to twelve units of spins and second perturbative order at weak coupling.
Article
Astronomy & Astrophysics
V. N. Velizhanin
Summary: This article computes the contribution of twist-2 operators in N = 4 SYM theory to the anomalous dimension. The obtained result is simpler compared to QCD and satisfies the maximal transcendentality principle. The possible relation to integrability is discussed.
Article
Physics, Multidisciplinary
Lance J. Dixon, Oemer Guerdogan, Yu -Ting Liu, Andrew J. McLeod, Matthias Wilhelm
Summary: We derive the symbol of the maximal-helicity-violating four-particle form factor for the chiral part of the stress-tensor supermultiplet in planar N = 4 super-Yang-Mills theory at two loops. The symbol involves only 34 letters and satisfies the extended Steinmann relations in all partially overlapping three-particle momentum channels. Furthermore, the remainder function for this form factor exhibits an antipodal self-duality that holds on a four-dimensional parity-preserving kinematic hypersurface. This self-duality implies the recently noticed antipodal duality between the three-particle form factor and the six-particle amplitude in this theory.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Industrial
Jacquelyn M. Maciukiewicz, Rachel L. Whittaker, Kimberly B. Hogervorst, Clark R. Dickerson
Summary: Occupational tasks often involve musculoskeletal demands that contribute to injury risk. A novel device has been introduced to mitigate these factors during pallet wrapping tasks, however, it was found that the device may increase muscular activation at higher and lower heights. Posture and muscular demands during pallet wrapping tasks are sensitive to both wrapping technique and wrapping height.
APPLIED ERGONOMICS
(2021)
Editorial Material
Neurosciences
Edward C. Cooper, Timothy Abreo, Baouyen Tran
Summary: In this article, Zheng et al. present a comprehensive view of the interaction between KCNQ channels and phosphatidyl inositol 4,5-bisphosphate (PIP2), offering insights into the modulatory mechanisms of channels associated with deafness, epilepsy, autism, and intellectual disability.（）
Article
Physics, Multidisciplinary
Livia Ferro, Tomasz Lukowski, Andrea Orta, Matteo Parisi
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2017)
Article
Physics, Particles & Fields
Mathew Bullimore, Hee-Cheol Kim, Tomasz Lukowski
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Particles & Fields
Johan Henriksson, Tomasz Lukowski
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Physics, Multidisciplinary
Livia Ferro, Tomasz Lukowski, Matteo Parisi
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2019)
Article
Physics, Particles & Fields
David Damgaard, Livia Ferro, Tomasz Lukowski, Matteo Parisi
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Tomasz Lukowski, Matteo Parisi, Marcus Spradlin, Anastasia Volovich
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Livia Ferro, Tomasz Lukowski, Robert Moerman
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Review
Physics, Multidisciplinary
Livia Ferro, Tomasz Lukowski
Summary: This review introduces recently established geometric methods for observables in quantum field theories, with a focus on amplituhedra and positive geometries. It also briefly describes other members of the positive geometries family associated with different physical quantities and discusses the main open problems in this field.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Computer Science, Interdisciplinary Applications
Tomasz Lukowski, Robert Moerman
Summary: Positive geometries offer a modern approach to calculate scattering amplitudes in various physical models. A Mathematica package called "amplituhedronBoundaries" is introduced to calculate the boundary structures of three positive geometries, including the amplituhedron, the momentum amplituhedron, and the hypersimplex. This package provides useful tools for studying these positive geometries, such as boundary stratifications and drawing boundary posets.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Physics, Particles & Fields
David Damgaard, Livia Ferro, Tomasz Lukowski, Robert Moerman
Summary: This paper studies the relationship between the momentum amplituhedron and the kinematic associahedron, finding a direct link between them in four-dimensional spacetime. The analysis highlights the common singularity structure of their amplitudes.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
David Damgaard, Livia Ferro, Tomasz Lukowski, Robert Moerman
Summary: Recent studies have shown that color-ordered scattering amplitudes can be encoded as logarithmic differential forms on positive geometries. These amplitudes benefit from the group-theoretic structure underlying color decompositions, enjoying various identities that relate to different orderings. The Kleiss-Kuijf relations are shown to arise from the geometry of the momentum amplituhedron, and similar relations can also be realized for the kinematic associahedron.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Tomasz Lukowski, Robert Moerman, Jonah Stalknecht
Summary: In this paper, we explore the connection between two modern descriptions of scattering amplitudes, the CHY formalism and the framework of positive geometries, facilitated by the scattering equations. We develop three methods to compute canonical forms in kinematic spaces without explicitly solving any scattering equations. Our results use techniques from computational algebraic geometry and extend the application of similar results for rational functions to rational differential forms.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Mathematical
Tomasz Lukowski
Summary: This paper studies the boundary structure of amplituhedron A(n,k)((2)), classifies all boundaries of all dimensions, and provides their graphical enumeration. It is found that the boundary poset for the amplituhedron is Eulerian and it is shown that the Euler characteristic of the amplituhedron equals one. This provides an initial step towards proving that the amplituhedron for m = 2 is homeomorphic to a closed ball.
ANNALES DE L INSTITUT HENRI POINCARE D
(2022)
Article
Mathematics
Tomasz Lukowski, Matteo Parisi, Lauren K. Williams
Summary: This paper studies the image of the positive Grassmannian and its positroid cells under two different tilde maps. It defines positroid dissections and conjectures a bijection between positroid dissections of the hypersimplex and positroid dissections of the amplituhedron. It also proves properties of the positive tropical Grassmannian and positroid polytopes.
INTERNATIONAL MATHEMATICS RESEARCH NOTICES
(2023)
Article
Physics, Particles & Fields
Livia Ferro, Tomasz Lukowski
Summary: In this paper, we focus on the scattering amplitudes in maximally supersymmetric Yang-Mills theory. We define a long sought-after geometry called the loop momentum amplituhedron, which is conjectured to encode tree and loop amplitudes in spinor helicity variables. By examining the structure of amplitude singularities, we introduce an extended positive space and a map that associates tree-level kinematic variables and loop momenta. The image of this map represents the loop momentum amplituhedron. Importantly, this formulation provides a global definition of the loop momenta and suggests the existence of a canonical logarithmic differential form on this space.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Bogdan Damski
Summary: In this paper, we discuss the dynamics of field configurations in the Proca theory of the real massive vector field, specifically focusing on a certain class of electric (magnetic) dipole-charged states. We construct these states to ensure that the long-distance structure of the mean electromagnetic field is initially set by the formula describing the electromagnetic field of the electric (magnetic) dipole. We analyze the evolution of this mean electromagnetic field over time and observe the phenomena of harmonic oscillations of the electric (magnetic) dipole moment far from the center of the initial field configuration, as well as the emergence of a spherical shock wave propagating at the speed of light near the center. Additionally, we discover a unique axisymmetric mean electric field configuration accompanying the mean magnetic field in magnetic dipole-charged states.
Article
Physics, Particles & Fields
Brett McInnes
Summary: The time-dependence of AdS black hole interior geometries poses challenges to holographic duality and the traversability of wormholes. Quantum circuit complexity of strongly coupled matter can address the first challenge. Data from a phenomenological model show an upper bound on the complexity growth rate, which becomes stricter with the addition of angular momentum. The slowing of black hole interior dynamics at high specific angular momentum also occurs.
Article
Physics, Particles & Fields
M. Beccaria, S. Giombi, A. A. Tseytlin
Summary: This article investigates the superconformal index Z of the 6d (2,0) theory on S5 x S1 and describes it using the quantum M2 brane theory in the large N limit. By studying M2 branes in a twisted product of thermal AdS7 and S4, the leading non-perturbative term at large N is shown to be reproduced by the 1-loop partition function of an instanton M2 brane wrapped on S1 x S2 with S2 c S4. Similarly, the partition function of a defect M2 brane wrapped on thermal AdS3 c AdS7 reproduces the BPS Wilson loop expectation value in the (2,0) theory. The article also comments on the analogy of these results with similar computations in the quantum M2 brane partition function in AdS4 x S7/DOUBLE-STRUCK CAPITAL Zk, which reproduced the corresponding localization expressions in the ABJM 3d gauge theory.
Article
Physics, Particles & Fields
Carlos Silva
Summary: This paper explores the nature of spacetime in quantum gravity based on a new version of the holographic principle that establishes a connection between string theory and polymer holonomy structures. The research findings suggest that, for this relationship to hold, spacetime must be perceived as emerging from a fundamental structure with degrees of freedom corresponding to quantum correlations only.
Article
Physics, Particles & Fields
A. Senol, H. Denizli, C. Helveci
Summary: This study investigates new physics using a Monte Carlo method, and the results show stronger limitations on anomalous quartic gauge couplings compared to previous experiments.
