Article
Mathematics, Applied
A. Alonso-Izquierdo, A. J. Balseyro Sebastian, M. A. Gonzalez Leon, J. Mateos Guilarte
Summary: In this paper, the entire kink varieties in several massive non-linear Sigma models with the torus S-1 x S-1 as the target space are analytically calculated. The construction of first-order differential equations is based on adapting the Bogomol'nyi procedure to non-Euclidean spaces. Non-topological kinks connecting the same vacuum state are found among the families of solutions. Although this class of solutions is usually considered not globally stable, the topological constraints obtained from the target space's non-simply connectedness make these non-topological kinks globally stable solutions. The analytical resolution of equations enables the complete study of linear stability for some basic kinks.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Physics, Multidisciplinary
Zhenjiu Wang, Michael P. Zaletel, Roger S. K. Mong, Fakher F. Assaad
Summary: The study utilizes the half-filled zeroth Landau level in graphene as a regularization scheme to explore the physics of the SO(5) nonlinear sigma model subject to a Wess-Zumino-Witten topological term in 2 + 1 dimensions. The research shows an ordered phase within a specific parameter range, indicating the potential for deconfined quantum phase transitions between valence bond solids and antiferromagnets.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Alexander Broad, Robert Darkins, Dorothy M. Duffy, Ian J. Ford
Summary: This article challenges the classical model of crystal growth by revealing that certain calcite kinks grow via a multistep mechanism, where solutes adsorb to an intermediate site before transitioning to the lattice site.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Dyk Chung Nguyen, Ruslan D. Yamaletdinov, Yuriy Pershin
Summary: The study found that graphene kinks exhibit different behaviors when encountering constrictions, including reflection, trapping, and transmission, with an attractive potential. In simple symmetric constrictions, kinks have a deep minimum in potential energy, but potential energy alone does not fully define behavior categories. Additionally, asymmetric constrictions can transform kinks from one type to another.
Article
Materials Science, Multidisciplinary
P. Virtanen, F. S. Bergeret, I. Tokatly
Summary: In this paper, we derive a nonlinear ℝ model to describe the diffusive transport in normal metals and superconductors with intrinsic spin-orbit coupling (SOC). The SOC is characterized by an SU(2) gauge field, and we expand the model to the fourth order in gradients to identify the leading non-Abelian field-strength contribution. This contribution gives rise to the spin-charge coupling responsible for the spin-Hall effect. We also obtain the corresponding Usadel equation to describe the diffusive spin-charge dynamics in superconducting systems and apply it to describe the anomalous supercurrent in dirty Rashba superconductors at arbitrary temperatures.
Article
Computer Science, Information Systems
Nikolaos Kolomvakis, Majid Bavand, Israfil Bahceci, Ulf Gustavsson
Summary: In this letter, a novel nullforming precoding scheme is proposed to mitigate the distortion caused by nonlinear hardware in multiple-input-multiple-output (MIMO) base stations towards victims operating in the same or adjacent frequency bands. The precoder is designed to steer nulls towards the victims in the same band and achieve per-antenna constant envelope (CE) precoding without compromising the nullforming of the desired signal. Analytical analysis shows that CE precoders exhibit similar spatial characteristics in the radiation pattern of nonlinear distortion as that of the desired signal in line-of-sight channels and for single-user transmission. Numerical results further validate the effectiveness of the proposed precoder.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Physics, Multidisciplinary
Antonino Flachi, Vincenzo Vitagliano
Summary: This paragraph discusses the quantum vacuum (Casimir) energy and its impact in field theory, showing that it induces long-range force in noninteracting massless quanta and exponentially decays for massive fields with increasing separations. The interplay between dimensionality and nonlinearities in the field theory alters this behavior in a nontrivial way, with nonlinearities generally responsible for modulations in the force as a function of the coupling constant and temperature.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Mathematics, Interdisciplinary Applications
Petr A. Blinov, Tatiana V. Gani, Alexander A. Malnev, Vakhid A. Gani, Vladimir B. Sherstyukov
Summary: In this study, we investigate a family of field-theoretic models involving a real scalar field in (1+1)-dimensional space-time. The dynamics of the field in each model is determined by a polynomial potential with two degenerate minima. We derive exact general formulas for kink solutions exhibiting power-law asymptotic behavior. Additionally, we provide formulas for the asymptotics of all discovered kinks and analyze other properties such as stability potentials, zero modes, and positions of the centers of mass for the obtained kinks.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Astronomy & Astrophysics
A. Kisselev, V. A. Petrov
Summary: In six-dimensional spacetime, we investigate the behavior of the running coupling in phi(3) theory with asymptotically free behavior when compactifying two spatial dimensions on a 2D closed manifold. The result is an effective 4D theory featuring infinitely many KK-type scalar fields with triple interactions. The dimensional coupling constant inherits running to zero at high mass scales in a modified form depending on the compact manifold size, with some physical implications being discussed.
Article
Astronomy & Astrophysics
Alexander C. Jenkins, Mairi Sakellariadou
Summary: This study calculates the nonlinear memory signal associated with GW bursts from cusps and kinks on cosmic string loops for the first time and finds that the cusp GW signal diverges for sufficiently large loops, while the kink memory signal does not diverge. It also investigates the prospects for detecting memory from cusps and kinks with current and future GW observatories, considering both individual memory bursts and the contribution of many such bursts to the stochastic GW background.
CLASSICAL AND QUANTUM GRAVITY
(2021)
Article
Chemistry, Multidisciplinary
Shuo Qiao, Deyu Li, Lin Yang
Summary: In this study, efficient heat flow modulation in a single material was achieved without a phase transition, using a simple and material-independent strategy of kinked nanostructure patterning at near-ambient temperature. The modulation was achieved by controlling the kink arm length and angle of Si nanoribbons, resulting from the competing roles of phonon backscattering and open view channels on heat transport. This study opens up new opportunities for efficient heat flow manipulation through nanostructure patterning.
Article
Multidisciplinary Sciences
Luca Naponiello, Luigi Mancini, Alessandro Sozzetti, Aldo S. Bonomo, Alessandro Morbidelli, Jingyao Dou, Li Zeng, Zoe M. Leinhardt, Katia Biazzo, Patricio E. Cubillos, Matteo Pinamonti, Daniele Locci, Antonio Maggio, Mario Damasso, Antonino F. Lanza, Jack J. Lissauer, Karen A. Collins, Philip J. Carter, Eric L. N. Jensen, Andrea Bignamini, Walter Boschin, Luke G. Bouma, David R. Ciardi, Rosario Cosentino, Silvano Desidera, Xavier Dumusque, Aldo F. M. Fiorenzano, Akihiko Fukui, Paolo Giacobbe, Crystal L. Gnilka, Adriano Ghedina, Gloria Guilluy, Avet Harutyunyan, Steve B. Howell, Jon M. Jenkins, Michael B. Lund, John F. Kielkopf, Katie V. Lester, Luca Malavolta, Andrew W. Mann, Rachel A. Matson, Elisabeth C. Matthews, Domenico Nardiello, Norio Narita, Emanuele Pace, Isabella Pagano, Enric Palle, Marco Pedani, Sara Seager, Joshua E. Schlieder, Richard P. Schwarz, Avi Shporer, Joseph D. Twicken, Joshua N. Winn, Carl Ziegler, Tiziano Zingales
Summary: Neptune-sized planets exhibit diverse compositions and densities, which are influenced by factors such as their distance from the host stars and atmospheric escape processes. TOI-1853 b, a planet in the hot-Neptune desert, has a mass almost twice that of any other Neptune-sized planet known so far and a high density dominated by heavy elements. The properties of TOI-1853 b challenge conventional theories of planetary formation and evolution and could be the result of multiple proto-planet collisions or the final state of a planet that migrated closer to its parent star.
Article
Astronomy & Astrophysics
Yen-Ta Huang, Dung-Hai Lee
Summary: This study considers the O(6) nonlinear sigma model with the Wess-Zumino-Witten term and observes the significant role played by solitons in the electromagnetic duality. These solitons, divided into two sets of order parameters, can trigger a direct phase transition. The authors suggest that the theory becomes self-dual at the critical point and identify two deconfined phases where finite-energy hedgehogs coexist with gapless U(1) gauge bosons.
Article
Multidisciplinary Sciences
Valentin M. Slepukhin, Maximilian J. Grill, Qingda Hu, Elliot L. Botvinick, Wolfgang A. Wall, Alex J. Levine
Summary: This study demonstrates that bundles of stiff filaments in living organisms can form kinked metastable states, proposing three possible mechanisms for kink stabilization and exploring the transition from the metastable kinked state to a stable straight bundle both numerically and analytically.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Mathematics, Interdisciplinary Applications
M. Mohammadi, E. Momeni
Summary: In this study, a new model (BV4 model) is introduced based on the V4 model to investigate the influence of parameter B on kink-antikink collisions. Numerical analysis is conducted to examine the effects of parameter B on critical speed, output velocities, escape windows, and other features. It is confirmed that parameter B plays a role in the emergence of nearly soliton behavior in kink-antikink collisions at certain initial speed intervals.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Physics, Multidisciplinary
A. Alonso Lzquierdo
Article
Physics, Particles & Fields
A. Alonso-Izquierdo, Rodrigo Fresneda, J. Mateos Guilarte, D. Vassilevich
EUROPEAN PHYSICAL JOURNAL C
(2019)
Article
Engineering, Multidisciplinary
A. Alonso Izquierdo, M. A. Gonzalez Leon, M. de la Torre Mayado
APPLIED MATHEMATICAL MODELLING
(2019)
Article
Mathematics, Applied
M. A. Gonzalez Leon, J. Mateos Guilarte, M. de la Torre Mayado
PHYSICA D-NONLINEAR PHENOMENA
(2020)
Article
Mathematics, Applied
A. Alonso-Izquierdo, M. A. Gonzalez Leon, J. Martin Vaquero, M. de la Torre Mayado
Summary: This paper discusses kink scattering in the dimensional reduction of a one-parameter family of generalized Wess-Zumino models with three vacuum points. The influence of vacuum arrangements on kink scattering is investigated, revealing two different regimes of kink formation and thorough analysis of scattering between two symmetric kinks.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Mathematics, Applied
A. Alonso-Izquierdo, L. M. Nieto, J. Queiroga-Nunes
Summary: The asymmetric scattering between wobblers and kinks in the standard phi(4) model was numerically investigated in two scenarios, resulting in different forms of interference and energy transfer. These situations led to very different fractal structures in the velocity diagrams.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Mathematics, Applied
A. Alonso-Izquierdo, A. J. Balseyro Sebastian, M. A. Gonzalez Leon, J. Mateos Guilarte
Summary: In this paper, the entire kink varieties in several massive non-linear Sigma models with the torus S-1 x S-1 as the target space are analytically calculated. The construction of first-order differential equations is based on adapting the Bogomol'nyi procedure to non-Euclidean spaces. Non-topological kinks connecting the same vacuum state are found among the families of solutions. Although this class of solutions is usually considered not globally stable, the topological constraints obtained from the target space's non-simply connectedness make these non-topological kinks globally stable solutions. The analytical resolution of equations enables the complete study of linear stability for some basic kinks.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Astronomy & Astrophysics
Alonso Izquierdo, W. Garcia Fuertes, J. Mateos Guilarte
Summary: We investigate topological vortex solutions in a generalized Abelian Higgs model with nonpolynomial dielectric and potential functions. These quantities are chosen by requiring integrability of the self-dual limit of the theory for all values of the magnetic flux. The model only has a symmetry-breaking superconducting phase and can sustain regular phenomenology.
Article
Astronomy & Astrophysics
Caio Almeida, Alberto Alonso-Izquierdo, Rodrigo Fresneda, Juan Mateos Guilarte, Dmitri Vassilevich
Summary: The vacuum fermion current in the (2+1) dimensional Jackiw-Rossi model was computed using the 1/m expansion and expressed through a weighted eta-function with a matrix weight. Surprisingly, direct computations showed that the fermion number induced by vortices in this model is not topological.
Article
Astronomy & Astrophysics
A. Alonso Izquierdo, J. Queiroga-Nunes, L. M. Nieto
Summary: In this paper, numerical investigations were conducted on the scattering between a wobbling kink and a wobbling antikink in the standard phi(4) model. The study discussed the dependence of final velocities, wobbling amplitudes, and frequencies of the scattered kinks on collision velocity and initial wobbling amplitude. The fractal structure becomes more intricate with the emergence of new resonance windows and the splitting of those arising in non-excited kink scattering. Outside this phase, the final wobbling amplitude shows a linear dependence on collision velocity, which is almost independent of the initial wobbling amplitude.
Article
Astronomy & Astrophysics
A. Alonso-Izquierdo, W. Garcia Fuertes, J. Mateos Guilarte
Article
Mathematics, Applied
Alberto Alonso-Izquierdo
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2020)
Article
Astronomy & Astrophysics
A. Alonso Izquierdo, W. Garcia Fuertes, J. Mateos Guilarte
