Results 31 to 40 of about 99,918 (270)

Holographic Protection of Chronology in Universes of the Godel Type [PDF]

open access: yes, 2002
We analyze the structure of supersymmetric Godel-like cosmological solutions of string theory. Just as the original four-dimensional Godel universe, these solutions represent rotating, topologically trivial cosmologies with a homogeneous metric and ...
A. A. Tseytlin   +30 more
core   +2 more sources

Holography for cosmology [PDF]

open access: yesPhysical Review D, 2010
We propose a holographic description of four-dimensional single-scalar inflationary universes, and show how cosmological observables, such as the primordial power spectrum, are encoded in the correlation functions of a three-dimensional QFT. The holographic description correctly reproduces standard inflationary predictions in the limit where a ...
McFadden, Paul, Skenderis, Kostas
openaire   +5 more sources

Multi-freedom metasurface empowered vectorial holography

open access: yesNanophotonics, 2022
Optical holography capable of the complete recording and reconstruction of light’s wavefront, plays significant roles on interferometry, microscopy, imaging, data storage, and three-dimensional displaying.
Deng Zi-Lan   +4 more
doaj   +1 more source

Robust Holographic Reconstruction by Deep Learning with One Frame

open access: yesPhotonics, 2023
A robust method is proposed to reconstruct images with only one hologram in digital holography by introducing a deep learning (DL) network. The U-net neural network is designed according to DL principles and trained by the image data set collected using ...
Xianfeng Xu   +3 more
doaj   +1 more source

Moyal Quantization, Holography, and the Quantum Geometry of Surfaces [PDF]

open access: yes, 1998
An elementary introduction is provided to the phase space quantization method of Moyal and Wigner. We generalize the method so that it applies to 2-dimensional surfaces, where it has an interesting connection with quantum holography.
Chapline, George, Granik, Alex
core   +2 more sources

Information multiplexing from optical holography to multi-channel metaholography

open access: yesNanophotonics, 2023
Holography offers a vital platform for optical information storage and processing, which has a profound impact on many photonic applications, including 3D displays, LiDAR, optical encryption, and artificial intelligence.
Márquez Andrés   +4 more
doaj   +1 more source

Linear polarization holography

open access: yesOpto-Electronic Science, 2022
Polarization holography is a newly researched field, that has gained traction with the development of tensor theory. It primarily focuses on the interaction between polarization waves and photosensitive materials.
Jinyu Wang   +11 more
doaj   +1 more source

Spin holography [PDF]

open access: yesPhysical Review Letters, 1994
The interference of the directly emitted photoelectron wave and the wave scattered coherently by neighboring atoms gives holographic fringes in the photoelectron emission intensity $I(\hat{\bf R})$. In the electron emission holography technique in surface physics, $I(\hat{\bf R})$ is inverted holographically to give a 3D-image of the environment of the
G. T. Trammell   +2 more
openaire   +3 more sources

Absorbing new subjects: holography as an analog of photography [PDF]

open access: yes, 2006
I discuss the early history of holography and explore how perceptions, applications, and forecasts of the subject were shaped by prior experience. I focus on the work of Dennis Gabor (1900–1979) in England,Yury N. Denisyuk (1927-2005) in the Soviet Union,
Johnston, Sean F.
core   +2 more sources

Holography in superspace [PDF]

open access: yesJournal of High Energy Physics, 2000
36 pages, LaTeX, references ...
Harlan Robins   +7 more
openaire   +5 more sources

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