Quartic function ≈ Quartic function
View article: Dark Energy after GW170817 and GRB170817A
Dark Energy after GW170817 and GRB170817A Open
The observation of GW170817 and its electromagnetic counterpart implies that gravitational waves travel at the speed of light, with deviations smaller than a few×10^{-15}. We discuss the consequences of this experimental result for models …
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Degenerate higher order scalar-tensor theories beyond Horndeski and disformal transformations Open
We consider all degenerate scalar-tensor theories that depend quadratically\non second order derivatives of a scalar field, which we have identified in a\nprevious work. These theories, whose degeneracy in general ensures the absence\nof O…
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Statistics and Properties of Low-Frequency Vibrational Modes in Structural Glasses Open
Low-frequency vibrational modes play a central role in determining various basic properties of glasses, yet their statistical and mechanical properties are not fully understood. Using extensive numerical simulations of several model glasse…
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Quartic Anharmonicity of Rattlers and Its Effect on Lattice Thermal Conductivity of Clathrates from First Principles Open
We investigate the role of the quartic anharmonicity in the lattice dynamics and thermal transport of the type-I clathrate Ba_{8}Ga_{16}Ge_{30} based on ab initio self-consistent phonon calculations. We show that the strong quartic anharmo…
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Cubic�quartic optical solitons in Lakshmanan�Porsezian�Daniel model derived with semi-inverse variational principle Open
We retrieve analytically a bright 1-soliton solution to a perturbed cubic-quartic Lakshmanan-Porsezian-Daniel model, using a semi-inverse variational principle.The perturbation terms are considered arising from the condition of maximum all…
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Fast Algorithms for Designing Unimodular Waveform(s) With Good Correlation Properties Open
In this paper, we develop new fast and efficient algorithms for designing single/multiple unimodular waveforms/codes with good auto- and cross-correlation or weighted correlation properties, which are highly desired in radar and communicat…
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High-Throughput Study of Lattice Thermal Conductivity in Binary Rocksalt and Zinc Blende Compounds Including Higher-Order Anharmonicity Open
Thermal transport phenomena are ubiquitous and play a critical role in the performance of various microelectronic and energy-conversion devices. Binary rocksalt and zinc blende compounds, despite their rather simple crystal structures, exh…
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Self-interactions and spontaneous black hole scalarization Open
It has recently been shown that nontrivial couplings between a scalar and the\nGauss-Bonnet invariant can give rise to black hole spontaneous scalarization.\nTheories that exhibit this phenomenon are among the leading candidates for\ntesti…
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Cubic�quartic optical solitons having quadratic�cubic nonlinearity by sine�Gordon equation approach Open
We reveal cubic-quartic optical solitons with quadratic-cubic nonlinearity for the first time.Both polarization-preserving and birefringent optical fibres are considered.The study is also extended to include the perturbation terms of Hamil…
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The S-matrix bootstrap. Part III: higher dimensional amplitudes Open
A bstract We consider constraints on the S-matrix of any gapped, Lorentz invariant quantum field theory in 3+1 dimensions due to crossing symmetry, analyticity and unitarity. We extremize cubic couplings, quartic couplings and scattering l…
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Scalarized black holes in the presence of the coupling to Gauss-Bonnet gravity Open
In this paper, we study static and spherically symmetric black hole (BH)\nsolutions in the scalar-tensor theories with the coupling of the scalar field\nto the Gauss-Bonnet (GB) term $\\xi (\\phi) R_{\\rm GB}$, where $R_{\\rm\nGB}:=R^2-4R^…
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Focus beyond Quadratic Speedups for Error-Corrected Quantum Advantage Open
In this perspective we discuss conditions under which it would be possible for a modest fault-tolerant quantum computer to realize a runtime advantage by executing a quantum algorithm with only a small polynomial speedup over the best clas…
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Stationary and dynamical properties of pure-quartic solitons Open
We numerically solve a generalized nonlinear Schrödinger equation and find a family of pure-quartic solitons (PQSs), existing through a balance of positive Kerr nonlinearity and negative quartic dispersion. These solitons have oscillatory …
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Viable inflation in scalar-Gauss-Bonnet gravity and reconstruction from observational indices Open
In this paper the focus is on inflationary dynamics in the context of\nEinstein Gauss-Bonnet gravitational theories. We investigate the implications\nof the slow-roll condition on the slow-roll indices and we investigate how the\ninflation…
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Optical Soliton Solutions of the Cubic-Quartic Nonlinear Schrödinger and Resonant Nonlinear Schrödinger Equation with the Parabolic Law Open
In this paper, the cubic-quartic nonlinear Schrödinger and resonant nonlinear Schrödinger equation in parabolic law media are investigated to obtain the dark, singular, bright-singular combo and periodic soliton solutions. Two powerful met…
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Dark Energy Instabilities induced by Gravitational Waves Open
In this talk I will discuss the decay of gravitational waves (GW) into dark energy fluctuations π in the context of the EFT of Dark Energy. \nIn such theories, the time-dependence of the Dark Energy (DE) field spontaneously breaks Lorentz …
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Positivity bounds on vector boson scattering at the LHC Open
Weak vector boson scattering (VBS) is a sensitive probe of new physics effects in the electroweak symmetry breaking. Currently, experimental results at the LHC are interpreted in the effective field theory approach, where possible deviatio…
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Measurement Cost for Variational Quantum Eigensolver on Molecular Hamiltonians Open
Variational quantum eigensolver (VQE) is a promising algorithm for near-term quantum machines. It can be used to estimate the ground state energy of a molecule by performing separate measurements of O(N4) terms. This quartic scaling appear…
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A Novel Hybrid Model for Predicting Blast-Induced Ground Vibration Based on k-Nearest Neighbors and Particle Swarm Optimization Open
In this scientific report, a new technique of artificial intelligence which is based on k-nearest neighbors (KNN) and particle swarm optimization (PSO), named as PSO-KNN, was developed and proposed for estimating blast-induced ground vibra…
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Pure-quartic solitons and their generalizations—Theory and experiments Open
Solitons are wave packets that can propagate without changing shape by balancing nonlinear effects with the effects of dispersion. In photonics, they have underpinned numerous applications, ranging from telecommunications and spectroscopy …
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Screening fifth forces in generalized Proca theories Open
For a massive vector field with derivative self-interactions, the breaking of\nthe gauge invariance allows the propagation of a longitudinal mode in addition\nto the two transverse modes. We consider generalized Proca theories with\nsecond…
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Strong quartic anharmonicity, ultralow thermal conductivity, high band degeneracy and good thermoelectric performance in Na2TlSb Open
We employ first-principles calculations combined with self-consistent phonon theory and Boltzmann transport equations to investigate the thermal transport and thermoelectric properties of full-Heusler compound Na 2 TlSb. Our findings exhib…
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The 2PM Hamiltonian for binary Kerr to quartic in spin Open
A bstract From the S-matrix of spinning particles, we extract the 2 PM conservative potential for binary spinning black holes up to quartic order in spin operators. An important ingredient is the exponentiated gravitational Compton amplitu…
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One-loop corrections in power spectrum in single field inflation Open
We revisit the one-loop correction in curvature perturbation power spectrum in models of single field inflation which undergo a phase of ultra slow-roll (USR) inflation. We include the contributions from both the cubic and quartic interact…
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Classifying the bosonic quartic couplings Open
The larger center-of-mass energy of the Large Hadron Collider Run 2 opens up the possibility of a more detailed study of the quartic vertices of the electroweak gauge bosons. Our goal in this work is to classify all operators possessing qu…
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Matter Dependence of the Four-Loop Cusp Anomalous Dimension Open
We compute analytically the matter-dependent contributions to the quartic Casimir term of the four-loop lightlike cusp anomalous dimension in QCD, with n_{f} fermion and n_{s} scalar flavors. The result is extracted from the double pole of…
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Fractonic superfluids Open
We propose a superfluid phase of “many-fracton system” in which charge and total dipole moments are conserved quantities. In this work, both microscopic model and long-wavelength effective theory are analyzed. We start with a second quanti…
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Effective holographic theory of charge density waves Open
We use gauge/gravity duality to write down an effective low energy holographic theory of charge density waves. We consider a simple gravity model which breaks translations spontaneously in the dual field theory in a homogeneous manner, cap…
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Hypostatic jammed packings of frictionless nonspherical particles Open
We perform computational studies of static packings of a variety of nonspherical particles including circulo-lines, circulo-polygons, ellipses, asymmetric dimers, dumbbells, and others to determine which shapes form packings with fewer con…
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Forces between kinks and antikinks with long-range tails Open
In a scalar field theory with a symmetric octic potential having a quartic minimum and two quadratic minima, kink solutions have long-range tails. We calculate the force between two kinks and between a kink and an antikink when their long-…