Results 61 to 70 of about 15,117 (175)

2-Group Representations for Spin Foams [PDF]

, 2009
Just as 3d state sum models, including 3d quantum gravity, can be built using categories of group representations, "2-categories of 2-group representations" may provide interesting state sum models for 4d quantum topology, if not quantum gravity. Here we
Aristide Baratin, Derek K. Wise, Jerzy Kowalski-Glikman, M. Szczachor, R. Durka   +4 more
core   +3 more sources

Metasurfaces and Metadevices for Topological Electromagnetic Waves

Advanced Physics Research, EarlyView.
Optical topologies refer to diverse topological localized structures made by diverse parameters of light fields, such as vortices, skyrmions, and hopfions. This article navigates a direction of metasurface‐based integrated devices for generation, manipulation and detection of novel topologies of light, which would be a rapidly growing interdisciplinary
Rensheng Xie, Nilo Mata‐Cervera, Xi Xie, Yijie Shen   +3 more
wiley   +1 more source

Measurement of intensity and polarization beatings in the interference of independent optical fields

Physical Review Research, 2020
We experimentally study the intensity and polarization beatings of interfering independent optical fields. Using the tools of intensity interferometry, we measure the beating harmonicity time and the degree of randomness of the polarization beating for ...
Andriy Shevchenko, Tero Setälä
doaj   +1 more source

Gravity as a Gauge Theory on Three-Dimensional Noncommutative spaces

, 2018
We plan to translate the successful description of three-dimensional gravity as a gauge theory in the noncommutative framework, making use of the covariant coordinates.
Jurman, D., Manolakos, G., Manousselis, P., Zoupanos, G.   +3 more
core   +1 more source

Entanglement of Purification and Multiboundary Wormhole Geometries [PDF]

, 2019
We posit a geometrical description of the entanglement of purification for subregions in a holographic CFT. The bulk description naturally generalizes the two-party case and leads to interesting inequalities among multi-party entanglements of ...
Bao, Ning, Chatwin-Davies, Aidan, Remmen, Grant N.   +2 more
core   +3 more sources

The Benjamin–Ono Equation in the Zero‐Dispersion Limit for Rational Initial Data: Generation of Dispersive Shock Waves

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT The leading‐order asymptotic behavior of the solution of the Cauchy initial‐value problem for the Benjamin–Ono equation in L2(R)$L^2(\mathbb {R})$ is obtained explicitly for generic rational initial data u0$u_0$. An explicit asymptotic wave profile uZD(t,x;ε)$u^\mathrm{ZD}(t,x;\epsilon)$ is given, in terms of the branches of the multivalued ...
Elliot Blackstone, Louise Gassot, Patrick Gérard, Peter D. Miller   +3 more
wiley   +1 more source

Existence of common zeros for commuting vector fields on $3$-manifolds [PDF]

, 2016
In $64$ E. Lima proved that commuting vector fields on surfaces with non-zero Euler characteristic have common zeros. Such statement is empty in dimension $3$, since all the Euler characteristics vanish. Nevertheless, \cite{Bonatti_analiticos} proposed a
Bonatti, Christian, Santiago, Bruno
core   +3 more sources

Edge Fluid Turbulence Simulations of Stellarators With GRILLIX

Contributions to Plasma Physics, EarlyView.
ABSTRACT The edge fluid turbulence code GRILLIX has recently been extended from axisymmetric tokamak geometries to support 3D stellarator configurations. Following successful proof‐of‐principle simulations published in Stegmeir et al., we present here a comprehensive simulation of the Wendelstein 7‐AS stellarator.
Andreas Stegmeir, Christoph Pitzal, Barnabas Csillag, Miguel Madeira, Marion Finkbeiner   +4 more
wiley   +1 more source

Observation of off-diagonal geometric phase in polarized neutron interferometer experiments

, 2002
Off-diagonal geometric phases acquired in the evolution of a spin-1/2 system have been investigated by means of a polarized neutron interferometer. Final counts with and without polarization analysis enable us to observe simultaneously the off-diagonal ...
A. Ekert, A. G. Klein, A. G. Wagh, A. G. Wagh, A. G. Wagh, A. G. Wagh, A. G. Zajonc, B. E. Allman, D. J. Richardson, F. Pistolesi, F. Pistolesi, G. Badurek, G. Badurek, G. Badurek, G. Badurek, G. Badurek, G. Kroupa, H. Rauch, H.-M. Lauber, J. A. Jones, J. Anandan, J. Samuel, J. Summhammer, M. Baron, M. O. Scully, M. V. Berry, N. Manini, N. Manini, P. D. D. Schwindt, R. Bhandari, R. Bhandari, R. Loidl, S. Pancharatnam, T. Bitter, Y. Aharanov, Y. Hasegawa, Y. Hasegawa, Y. Hasegawa   +37 more
core   +1 more source

Single‐Shot Full‐Stokes Analysis of Partially‐Polarized Light With a Photonic Deep Random Neural Network

Laser &Photonics Reviews, EarlyView.
Photonic neural networks are emerging as a powerful tool for analyzing light. The article reports a photonic deep random neural network that performs single‐shot low‐latency measurements of the state and degree of polarization with high accuracy. Using only a stack of glass diffusers on top of a small camera sensor, this neuromorphic polarization ...
Alessandro Petrini, Claudio Conti, Davide Pierangeli   +2 more
wiley   +1 more source