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originally posted by: Peeple
a reply to: Reverbs
Oh! Nice! I'm home sick for another week. I'm actually pretty fine, but ey! Right? I'm watching Rogue One (?) Star Wars
At the level of quantum particles (we are talking individual photons, elementary particles or individual atoms), there is something called Wheeler's delayed-choice experiments that show that actions in the present can influence the past.
The experiments use something called the wave-particle duality of light and of matter, the fact that the physical nature of quantum objects is undetermined until it is measured.
One of the deepest mysteries of quantum mechanics is that an interference pattern is formed even if there is only one particle in the experimental set-up at any given time. The Vienna team write that “all these observations support the view that each carbon-60 molecule interferes with itself only.” They also confirmed that the interactions of the molecules with their environment – such as the spontaneous emission of photons by the thermally excited molecules – could not reveal which slit they had passed through. Even the mere possibility of being able to know which slit the particle passes through would be enough to wipe out the interference pattern.
The wave nature of matter is a key ingredient of quantum physics and yet it defies our classical intuition. First proposed by Louis de Broglie a century ago, it has since been confirmed with a variety of particles from electrons up to molecules. Here we demonstrate new high-contrast quantum experiments with large and massive tailor-made organic molecules in a near-field interferometer. Our experiments prove the quantum wave nature and delocalization of compounds composed of up to 430 atoms
And that raises an interesting question: how big an object can physicists observe behaving like a wave? Today, Sandra Eibenberger at the University of Vienna in Austria and a few pals say they’ve smashed the record for a quantum superposition by observing wavelike behaviour in giant molecules containing over 800 atoms...
...However, it still leaves open the question of how big an object can be and still be observed forming a quantum superposition. These molecules are of course tiny but they are within an order of magnitude or so of the smallest viruses.
A microorganism with a mass much smaller than the mass of the electromechanical membrane will not significantly affect the quality factor of the membrane and can be cooled to the quantum ground state together with the membrane. Quantum superposition and teleportation of its center-of-mass motion state can be realized with the help of superconducting microwave circuits. More importantly, the internal states of a microorganism, such as the electron spin of a glycine radical, can be entangled with its center-of-mass motion and teleported to a remote microorganism. Our proposal can be realized with state-of-art technologies. The proposed setup is a quantum-limited magnetic resonance force microscope. Since internal states of an organism contain information, our proposal also provides a scheme for teleporting information or memories between two remote organisms.
In recent years, a growing body of evidence shows that photons play an important role in the basic functioning of cells. Most of this evidence comes from turning the lights off and counting the number of photons that cells produce. It turns out, much to many people’s surprise, that many cells, perhaps even most, emit light as they work...
...In fact, it looks very much as if many cells use light to communicate. There’s certainly evidence that bacteria, plants and even kidney cells communicate in this way. Various groups have even shown that rats brains are literally alight thanks to the photons produced by neurons as they work...
...Maybe. They go on to suggest that the light channelled by microtubules can help to co-ordinate activities in different parts of the brain. It’s certainly true that electrical activity in the brain is synchronised over distances that cannot be easily explained. Electrical signals travel too slowly to do this job, so something else must be at work.
The neural network studies have indicated that neural signal transmission and encoding is in a nonlinear network mechanism (8–10), in which biophotons, also called ultraweak photon emission (UPE), may be involved (11). A recent study has demonstrated that glutamate, the most abundant neurotransmitter in the brain, could induce biophotonic activities and transmission in neural circuits (12), suggesting that biophotons may play a key role in neural information processing and encoding and may be involved in quantum brain mechanism (11, 13–16);
First, we use quantum antennas, i.e., antennas that are in a quantum superposition of states," Kempf told Phys.org. "For example, with current quantum optics technology, atoms can be used as such antennas. Secondly, we use the fact that, when real photons are emitted (and propagate at the speed of light), the photons leave a small afterglow of virtual photons that propagate slower than light. This afterglow does not carry energy (in contrast to real photons), but it does carry information about the event that generated the light. Receivers can 'tap' into that afterglow, spending energy to recover information about light that passed by a long time ago."
In a new study, published in Nature, a group of researchers from MIT showed for the first time that it is possible to activate a memory on demand, by stimulating only a few neurons with light, using a technique known as optogenetics. Optogenetics is a powerful technology that enables researchers to control genetically modified neurons with a brief pulse of light.
To artificially turn on a memory, researchers first set out to identify the neurons that are activated when a mouse is making a new memory. To accomplish this, they focused on a part of the brain called the hippocampus, known for its role in learning and memory, especially for discriminating places. Then they inserted a gene that codes for a light-sensitive protein into hippocampal neurons, enabling them to use light to control the neurons.
Using perturbation theory to describe the orbits of smaller bodies around large ones in space required Batygin to posit all objects in each specific orbit as a single entity and “smear” them into the form of a concentric ring, or wire. In the model, each such ring exhibited the same gravitational force as the combined individual objects, but uniformly distributed.
In such an approach, the solar system, for instance, would be represented by the sun, followed by a wire ring for each planet, plus others for the asteroid belt and Kuiper belt. Computer simulations representing millions of years showed that these rings behaved in ways that closely mirrored the behaviour of the real composite disc surrounding the sun.
Batygin then started refining the model, realising that he could portray any astrophysical system as a centre surrounded by ever more numerous, but ever thinner, wires until, inevitably, the wires blended into a single plane.
“Eventually, you can approximate the number of wires in the disk to be infinite, which allows you to mathematically blur them together into a continuum,” he says. “When I did this, astonishingly, the Schrödinger equation emerged in my calculations.”
originally posted by: Peeple
a reply to: Reverbs
It's the intellectual take of a disaster movie. Less action more complicated relationships.
But it's fun.