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E. I. du Pont de Nemours and Company….
Category: 4. Physics
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Laser beams programmed to form various shapes by nanodisk arrays
Laser beams programmed to form various shapes by nanodisk arrays
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Tensor networks for quantum computing
Schollwöck, U. The density-matrix renormalization group in the age of matrix product states. Ann. Phys. 326, 96–192 (2011).
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Orús, R. Tensor networks for complex…
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Building electronics that don’t die: Columbia’s breakthrough at CERN
The Large Hadron Collider (LHC) is tough on electronics. Situated inside a 17-mile-long tunnel that runs in a circle under the border between Switzerland and France, this massive scientific instrument accelerates particles close to the speed of…
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Making Small Free-Electron Lasers More Reliable
• Physics 18, s100
A laser-plasma-driven free-electron laser achieves record performance, marking a step toward making intense, ultrafast x-ray sources more accessible.
T. Swift/LBNL
For two decades,…
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Light Versus Light: The Secret Physics Battle That Could Rewrite the Rules
In a fascinating dive into the strange world of quantum physics, scientists have shown that light can interact with itself in bizarre ways—creating ghost-like virtual particles that pop in and out of existence. This “light-on-light scattering”…
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MIT Just Proved Einstein Wrong in the Most Famous Quantum Experiment
MIT physicists have performed the most precise version of the famous double-slit experiment, using ultracold atoms and single photons to reveal the strange dual nature of light as both wave and particle. This quantum balancing act—long debated…
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Gold Does Something Unexpected When Superheated Past Its Melting Point : ScienceAlert
Gold remains perfectly solid when briefly heated beyond previously hypothesized limits, a new study reports, which may mean a complete reevaluation of how matter behaves under extreme conditions.
The international team of scientists behind the…
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An on-chip phased array for non-classical light
Theory
Consider a quantized electromagnetic field \(\hat{E}\) transmitted over free space to a phased array receiver. The field can be decomposed into positive and negative frequency components, \(\hat{E}={\hat{E}}^{+}+{\hat{E}}^{-}\), where
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Material analysis through X-ray attenuation decomposition in spectral computed tomography
Calculating (\(\mu _{PE},\mu _{CS}\))
In 1976 Alvarez and Macovski14 described that for energies relevant for medical imaging, the x-ray attenuation \(\mu\) for any material can be approximated as
$$\begin{aligned} \mu (Z,E) = a_{PE}(Z) \times…
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