Results 31 to 40 of about 522,797 (308)
Regular Solutions in Higher-Derivative Gravity
Universe, 2018 Local gravitational theories with more than four derivatives can have remarkable quantum properties. Namely, they can be super-renormalizable and may be unitary in the Lee-Wick sense, if the massive poles of the propagator are complex.
Breno L. Giacchini +1 more
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On Generation, Motions, and Collisions of Dowsons
Frontiers in Physics, 2020 Dowsons are ±2π point singularities of the unitary complex order parameter eiφ characterizing the so-called dowser texture in a thin nematic layer with homeotropic boundary conditions.
Pawel Pieranski, Maria Helena Godinho
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Complex-time singularity and locality estimates for quantum lattice systems [PDF]
Journal of Mathematical Physics, 2015 We present and prove a well-known locality bound for the complex-time dynamics of a general class of one-dimensional quantum spin systems. Then we discuss how one might hope to extend this same procedure to higher dimensions using ideas related to the Eden growth process and lattice trees. Finally, we demonstrate with a specific family of lattice trees
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Local invariants of singular surfaces in an almost complex four-manifold [PDF]
Annals of Global Analysis and Geometry, 1993 Let \(f: S^2\to (M^4, J)\) be a generic mapping, that is, \(f\) is a finite cover of an almost everywhere immersion (except for a finite number of points) which has only finite complex points. To such a mapping \(f\) the authors assign local invariants \(i(x)\) and \(m(x)\) at every point \(x\in f (S^2)\). The invariant \(i(x)\) is defined as the local
Ishikawa, Goo, Ohmoto, Toru
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On a Poincare lemma for foliations [PDF]
, 2013 In this paper we revisit a Poincare lemma for foliated forms, with respect to a regular foliation, and compute the foliated cohomology for local models of integrable systems with singularities of nondegenerate type. A key point in this computation is the
Miranda, Eva, Solha, Romero
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Complex Tauberian theorems for Laplace transforms with local pseudofunction boundary behavior [PDF]
Journal d'Analyse Mathematique, 2016 We provide several Tauberian theorems for Laplace transforms with local pseudofunction boundary behavior. Our results generalize and improve various known versions of the Ingham–Fatou–Riesz theorem and the Wiener–Ikehara theorem.
Gregory Debruyne, J. Vindas
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Frontiers in Physics, 2022 Atomic gases tightly trapped near the focus of an electromagnetic wave interact with photons that exhibit a complex structure, displaying strong gradients of field amplitude and local polarization that can lead to topological phase singularities.
R. Gutiérrez-Jáuregui, R. Jáuregui
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The Bell states in noncommutative algebraic geometry [PDF]
, 2014 We introduce new mathematical aspects of the Bell states using matrix factorizations, nonnoetherian singularities, and noncommutative blowups. A matrix factorization of a polynomial $p$ consists of two matrices $\phi_1,\phi_2$ such that $\phi_1\phi_2 ...
Charlie Beil +3 more
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Scientific Reports, 2022 Irregular spatial distribution of photon transmission through a photochromic crystal photoisomerized by a local optical near-field excitation was previously reported, which manifested complex branching processes via the interplay of material deformation ...
Kazuharu Uchiyama +8 more
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Sharp Focusing of a Hybrid Vector Beam with a Polarization Singularity
Photonics, 2021 The key result of this work is the use of the global characteristics of the polarization singularities of the entire beam as a whole, rather than the analysis of local polarization, Stokes and Poincare–Hopf indices.
Victor V. Kotlyar +2 more
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