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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.”

Unknown physics that could undermine quantum theory has been ruled out in a measurement guided by starlight emitted at least six centuries ago.

Surprised it took this long for this article to surface.

Quantum and travel.

Continue reading “Quantum Entanglement May Be Key To Long Distance Space Travel – Ex Lockheed Exec Said It’s Already Happening” »

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.

Continue reading “Realizing high-performance and low-cost fluorescent organic LEDs” »

Excellent interview with Sean Carroll on Quantum Mechanics and the Cosmos.

Sean Carroll tells Jim why he abandoned Einstein for quantum entanglement.

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.

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.

Sounds definitely like DARPA could be looking at a more seamless BMI type technology and yes, Quantum Bio and telepathy is involved.

For decades scientists have wondered whether electromagnetic waves might play a role in intra- and inter-cell signaling. Researchers have suggested since the 1960s, for example, that terahertz frequencies emanate from cell membranes, but they’ve lacked the technology and tools to conduct reproducible experiments that could prove whether electromagnetic waves constitute purposeful signals for biological function-or if they’re merely background noise.

With recent advances in technology and modeling, experiments may now be possible to test signaling hypotheses. DARPA’s RadioBio program, announced this week, seeks to establish if purposeful electromagnetic wave signaling between biological cells exists-and if evidence supports that it does, to determine what information is being transferred.

Continue reading “What role does electromagnetic signaling have in biological systems” »

In Brief

• Scientists were able to rig up a system in which they could view a “photon-blockade breakdown” where the system switched from opaque to transparent.
• This discovery has implications in both the development of advanced computer memory systems and better quantum simulations in the future.

For the first time, physicists have experimentally observed a first-order phase transition occur in a quantum system – verifying years of theoretical predictions.

Phase transitions are something that we see on a daily basis when our ice melts into water, or steam evaporates from a boiling kettle. While these transitions are easy for us to observe, phase transitions also happen on the very tiny, quantum-scale, where they play an important role in physics. But, up until now, no one had ever witnessed one experimentally.

Continue reading “For the First Time Scientists Have Observed a Quantum Phase Transition” »