Results 51 to 60 of about 64,072 (295)

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

Exoplanet Searches by Future Deep Space Missions

EPJ Web of Conferences, 2011
The search for exoplanets could benefit from gravitational lensing if we could get to 550 AU from the Sun and beyond. This is because the gravitational lens of the Sun would highly intensify there any weak electromagnetic wave reaching the solar system ...
Maccone C.
doaj   +1 more source

Gravitational Lens Time Delays Using Polarization Monitoring

Galaxies, 2017
Gravitational lens time delays provide a means of measuring the expansion of the Universe at high redshift (and therefore in the ‘Hubble flow’) that is independent of local calibrations.
Andrew Biggs, Ian Browne
doaj   +1 more source

B0850+054: a new gravitational lens system from CLASS [PDF]

, 2002
We report the discovery of a new gravitational lens system from the CLASS survey. Radio observations with the VLA, the WSRT and MERLIN show that the radio source B0850+054 is comprised of two compact components with identical spectra, a separation of 0.7
A. C. S. Readhead, A. D. Biggs, A. G. De Bruyn, C. D. Fassnacht, Chae, D. Rusin, I. W. A. Browne, J. P. McKean, K.- H. Chae, L. V. E. Koopmans, M. A. Norbury, N. J. Jackson, P. M. Phillips, P. N. Wilkinson, R. D. Blandford, S. T. Myers, T. J. Pearson   +16 more
core   +3 more sources

Light‑Driven Propulsion of Graphene Aerogels in Microgravity

Advanced Science, EarlyView.
Ultralight graphene aerogels convert laser light into thrust. Parabolic‐flight experiments directly compare their motion in microgravity and at 1 g, revealing order‐of‐magnitude enhancements in distance, velocity, and transient thrust when weight and friction are removed (∼50 times enhancement).
Omnia Khattab, Rami Elkaffas, Basel Altawil, Omar Alsuwaidi, Afnan Almubashir, Claire Perfetti, Shanavas Shajahan, Marco Braibanti, Sean Swei, Carlo Saverio Iorio, Yarjan Abdul Samad   +10 more
wiley   +1 more source

The wave nature of continuous gravitational waves from microlensing [PDF]

, 2019
Gravitational wave predicted by General Relativity is the transverse wave of spatial strain. Several gravitational waveform signals from binary black holes and from a binary neutron star system accompanied by electromagnetic counterparts have been ...
Biesiada, Marek, Fan, Xi-Long, Liao, Kai
core   +2 more sources

Mixing‐Driven Defects and Composition Evolution in Multi‐Material Metal Additive Manufacturing

Advanced Science, EarlyView.
Operando synchrotron X‐ray imaging coupled with high‐fidelity multiphysics modeling uncovers how inter‐material mixing reshapes keyhole dynamics and drives distinct pore‐formation pathways in multi‐material laser powder bed fusion (LPBF). Composition‐dependent instabilities trigger defects, whereas rescanning suppresses porosity and homogenizes Cu ...
Zhilang Zhang, Steve Gaudez, Mario Togni, Steven Van Petegem, Markus Bambach, Mamzi Afrasiabi   +5 more
wiley   +1 more source

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research
The celebrated theory of general relativity has inspired research on optical simulations using artificial microstructures to mimic curved space–times.
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
doaj   +1 more source

A Forward, Analytic, Differentiable, Geometric (but Inflexible) Lens Model

Galaxies
We anticipate that hundreds of thousands of distant, strongly gravitationally lensed sources will be detectable with European Space Agency’s (ESA) Euclid mission and the Rubin Observatory Legacy Survey of Space and Time.
Paul L. Schechter
doaj   +1 more source

IMAGES DISTRIBUTION OF BINARY SYMMETRICAL GRAVITATIONAL LENS

Odessa Astronomical Publications, 2019
In this paper, we study the distribu- tion of images from a point source in N - point gravi- tational lenses. It is well known that in a Schwarzschild lens (N = 1) from a point source, there are always two images.
A. T. Kotvytskiy, S. D. Bronza, V. Yu. Shablenko   +2 more
doaj   +1 more source