Results 101 to 110 of about 68,202 (308)
Codimension-two holography for wedges [PDF]
, 2020 We propose a codimension-two holography between a gravitational theory on a d+1 dimensional wedge spacetime and a d-1 dimensional CFT which lives on the corner of the wedge.
Abram Akal +3 more
semanticscholar +1 more source
Physical Review D, 1999 We study a topological field theory in four dimensions on a manifold with boundary. A bulk-boundary interaction is introduced through a novel variational principle rather than explicitly. Through this scheme we find that the boundary values of the bulk fields act as external sources for the boundary theory.
Viqar Husain, Sebastian Jaimungal
openaire +2 more sources
Effect of Core Geometry on Frequency Correlations and Channel Capacity of a Multimode Optical Fiber
Advanced Photonics Research, EarlyView.Structured wavefronts focused at the output of multimode fibers reveal a distinct spatial dependence of frequency correlation bandwidth between circular and rectangular cores. Unlike conventional circular‐core fibers, rectangular‐core fibers maintain uniform bandwidth across all transverse locations, enabling over a 20% increase in channel capacity for
Henry C. Hammer, Ravitej Uppu
wiley +1 more source
Results in Chemistry, 2022 In this work, the 3D interconnected cobalt oxide nanoflakes (CON) were grown successfully on nickel foam (NF) at ambient conditions by the electrodeposition method, further followed by calcination.
Teja M. Patil +7 more
doaj
3D-Integrated metasurfaces for full-colour holography
Light: Science & Applications, 2019 Metasurfaces enable the design of optical elements by engineering the wavefront of light at the subwavelength scale. Due to their ultrathin and compact characteristics, metasurfaces possess great potential to integrate multiple functions in ...
Yueqiang Hu +7 more
semanticscholar +1 more source
Journal of High Energy PhysicsAbstract We derive and test a novel holographic duality in the B-model topological string theory. The duality relates the B-model on certain Calabi-Yau three-folds to two-dimensional chiral algebras defined as gauged βγ systems. The duality conjecturally captures a topological sector of more familiar AdS5/CFT4 holographic dualities.
Kevin Costello, Davide Gaiotto
openaire +3 more sources
Nuclear Physics B, 2002 We show that the Abelian Higgs field equations in the four dimensional anti de Sitter spacetime have a vortex line solution. This solution, which has cylindrical symmetry in AdS$_4$, is a generalization of the flat spacetime Nielsen-Olesen string. We show that the vortex induces a deficit angle in the AdS$_4$ spacetime that is proportional to its mass ...
M. H. Dehghani +2 more
openaire +3 more sources
Advanced Photonics Research, EarlyView.The strong coupling is investigated as an effective method to modulate the second‐harmonic generation (SHG) in the defect mode and Tamm plasmon resonances. Throughout the entire anticrossing Rabi splitting process induced by strong coupling, the difference in SHG efficiency between two resonances can be modulated by up to two orders of magnitude ...
Ying Zhu +7 more
wiley +1 more source
iScience, 2020 Summary: Holography was originally invented for the purpose of magnifying electron microscopic images without spherical aberration and has been applied to photography for recording and reconstructing three-dimensional objects.
Satoshi Kawata, Miyu Ozaki
doaj
Open Physics, 2019 This paper presents an evaluation of the realism of a full-color reflection H2 analog hologram recorded on ultra-fine-grain silver-halide material. An H2 hologram is a transplane image that is different from the well-known Denisyuk hologram in which the ...
Gentet Philippe +3 more
doaj +1 more source