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Feb 7, 2017
Quantum Biology: An Introduction
Posted by Karen Hurst in categories: biological, quantum physics
As Geordie Rose was to QC; Jim Al-Khalili is to Quantum Biology. QC and QB will together make a new advance quantum tech world complete as both are needed to advance both the foundation(infrastructure) and the products and services we love and rely on.
What is quantum biology? Philip Ball explains how strange quantum effects take place in the messy world of biology, and how these are behind familiar biological phenomena such as smell, enzymes and bird’s migration.
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Feb 7, 2017
Bohr’s quantum theory revised
Posted by Karen Hurst in categories: education, information science, quantum physics
Bohr’s atomic model was utterly revolutionary when it was presented in 1913 but, although it is still taught in schools, it became obsolete decades ago. However, its creator also developed a much wider-ranging and less known quantum theory, the principles of which changed over time. Researchers at the University of Barcelona have now analysed the development in the Danish physicist’s thought — a real example of how scientific theories are shaped.
Most schools still teach the atomic model, in which electrons orbit around the nucleus like the planets do around the sun. The model was proposed more than a century ago by Danish physicist Niels Bohr based on Rutherford’s first model, the principles of classical mechanics and emerging ideas about ‘quantisation’ (equations to apply initial quantum hypotheses to classical physical systems) advanced by Max Planck and Albert Einstein.
As Blai Pié i Valls, a physicist at the University of Barcelona, explains: “Bohr published his model in 1913 and, although it was revolutionary, it was a proposal that did little to explain highly varied experimental results, so between 1918 and 1923 he established a much more wide-ranging, well-informed theory which incorporated his previous model.”
Feb 7, 2017
Starlight test shows quantum world has been weird for 600 years
Posted by Karen Hurst in category: quantum physics
Unknown physics that could undermine quantum theory has been ruled out in a measurement guided by starlight emitted at least six centuries ago.
Feb 7, 2017
Quantum Entanglement May Be Key To Long Distance Space Travel – Ex Lockheed Exec Said It’s Already Happening
Posted by Karen Hurst in categories: particle physics, quantum physics, space travel
Surprised it took this long for this article to surface.
Quantum and travel.
Feb 7, 2017
Realizing high-performance and low-cost fluorescent organic LEDs
Posted by Karen Hurst in categories: energy, quantum physics
A purely organic p–n junction is used as the luminescent center in a novel planar device that exhibits a high external quantum efficiency and an extremely low driving voltage.
In recent years, organic LEDs (OLEDs) have become a popular option for creating digital displays. These devices generally consist of three types of semiconductors (i.e., a p-type hole-transport layer, an n-type electron-transport layer, and an emission layer).1–3 The emission layer (normally capable of bipolar transport) provides a platform for carrier capture, exciton generation, and transition, and the luminescent property of an OLED mainly depends on the fluorescence behavior of single-molecule emitters. However, the incorporation of the emission layer within the structure of an OLED causes two energy barriers to be induced at the interfaces with the emission and transport layers. This means that the driving voltages for OLEDs are generally much larger than for traditional inorganic LEDs (with similarly chromatic emission). Moreover, the excitons that are generated at most purely organic emitters have a strong binding energy.
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Feb 7, 2017
Sean Carroll on how time and space began
Posted by Karen Hurst in category: quantum physics
Excellent interview with Sean Carroll on Quantum Mechanics and the Cosmos.
Sean Carroll tells Jim why he abandoned Einstein for quantum entanglement.
Feb 7, 2017
Quantum Interference and Selectivity through Biological Ion Channels
Posted by Karen Hurst in categories: biological, quantum physics
Nice report published in Jan on.
The mechanism of selectivity in ion channels is still an open question in biology for more than half a century. Here, we suggest that quantum interference can be a solution to explain the selectivity mechanism in ion channels since interference happens between similar ions through the same size of ion channels. In this paper, we simulate two neighboring ion channels on a cell membrane with the famous double-slit experiment in physics to investigate whether there is any possibility of matter-wave interference of ions via movement through ion channels. Our obtained decoherence timescales indicate that the quantum states of ions can only survive for short times, i.e. ≈100 picoseconds in each channel and ≈17–53 picoseconds outside the channels, giving the result that the quantum interference of ions seems unlikely due to environmental decoherence. However, we discuss our results and raise few points, which increase the possibility of interference.
Feb 7, 2017
Two factor-based reprogramming of rodent and human fibroblasts into Schwann cells
Posted by Karen Hurst in category: biotech/medical
Schwann cells (SCs) myelinate peripheral nerve axons and offer opportunities for the treatment of injuries and demyelinating diseases but reliable and renewable sources of these cells are hard to come by.
Feb 7, 2017
Determining the Photoisomerization Quantum Yield of Photoswitchable Molecules in Solution and in the Solid State
Posted by Karen Hurst in categories: biological, chemistry, quantum physics
Photoswitchable molecules are able to isomerize between two metastable forms through light stimuli. Originally being studied by photochemists, this type of molecule has now found a wide range of applications within physics, chemistry and biology. The extensive usage of photochromic molecules is due to the two isomers having fundamentally different physical and chemical properties. The most important attribute of a photoswitch is the photoisomerization quantum yield, which defines the efficiency of the photoisomerization event. Here we show how to determine the photoisomerization quantum yield in the solid state and in solution when taking thermal processes into account. The described method together with provided software allows for rapid and accurate determination of the isomerization process for this important class of molecules.