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L&FP, 65e: Imaging light as a “wavicle” — both wave and particle

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. . . using standing waves of light, vid:


Here is a snapshot:

By setting up standing waves and using an electron beam to interact with it, a map could be imaged on photon location and waves. As an article explains:

Until now [–> c 2015], scientists have only ever been able to capture an image of light as either a particle or a wave, and never both at the same time. But a team from the École Polytechnique Fédérale de Lausanne in Switzerland have managed to overcome the obstacles that stood in the way of previous experiments by using electrons to image light in this very strange state. 

The key to their success is their unusual experiment design. First they fire a pulse of laser light at a single strand of nanowire suspended on a piece of graphene film. This causes the nanowire to vibrate, and light particles – or photons – are sent travelling along it in two possible directions. When light particles that are travelling on opposite directions meet and overlap on the wire, they form a wave. Known as a ‘standing wave’, this state creates light that radiates around the nanowire . . . . by feeding a stream of electrons into the area nearby the nanowire, they could force an interaction between the electrons and the light that had been confined on the nanowire. 

This interaction caused the electrons to either speed up or slow down, and the team used an ultrafast electron microscope to capture this exact moment, so they could visualise the standing wave, “which acts as a fingerprint of the wave-nature of light,” the press release explains. Publishing their results in Nature Communications, the team discusses how this collision between the photons and electrons and the consequential speed-change experienced by the electrons appears as an exchange of energy, which can be visualised by the microscope.

So the top part of the image is the standing wave, while the bottom shows where the photons are located. 

“This experiment demonstrates that, for the first time ever, we can film quantum mechanics – and its paradoxical nature – directly,” one of the team, physicist  Fabrizio Carbone, said in a press release. “Being able to image and control quantum phenomena at the nanometer scale like this opens up a new route towards quantum computing.”

More food for (humbling) thought. KF

Origenes, it is actually far more bizarre than that, recall in the low intensity double slit exercise the individual photons [and electrons etc up to IIRC 2,000 atom molecules] interfere with themselves. At that level we have quantised lumps of matter that are both waves and particles, hence the whimsical word-blend. The image above is for electrons interacting with photons in a standing wave pattern and show them exhibiting particle and wave properties at the same time. KF kairosfocus
KF @1
Imaging light as a “wavicle” — both wave and particle
I can imagine a thing that is continually morphing in shape; continually oscillating between let’s say a square and a round form. Now suppose this oscillating process goes so fast that it is impossible for us to tell if it is in a square or a round state until we make a snapshot of it; a measurement. Is this concept consistent with a “wavicle”? Origenes
What’s a wavicle? Waves are not physical entities in the macro world. They are mental concepts to describe patterns of particles. So it’s hard to take this concept and assume it describes an individual entity that we can not observe. I asked this question to an expert in quantum mechanics and the reply was that it’s essentially a mystery. jerry
Lumpy waves kairosfocus
Of related note:
",,, These are just electrons which are trapped in the surface layer. But within the surface layer they are free to move around. These electrons are waves. And the waves, when they move they sometimes bang into features on the surface, like the step edges, or the individual atoms which are sticking out of the surface. And when a wave bangs into something it reflects off of that thing. And when you have a reflected wave adding together with an incoming part of the wave it sets up what we call a standing wave. These are regions where there are large oscillations that are fixed where they are in space, and regions where oscillations go to zero.,,, Maybe I'm just a heretic, (but) I don't believe in this wave-particle duality mumbo jumbo. I think is is mostly just left over baggage of having started off understanding the world as particles, and then being forced, because of the quantum revolution, to view the world in terms of waves. And we are stuck with this dualistic way of looking at these very small particles. Don't even think about them as particles. Electrons are waves. And if you think of them in terms of waves, you will always end up with the right answer. Always!" - Don Eigler - IBM Physicist - Discovering Science: Uncertain Principles – video - 25:00 minute mark https://youtu.be/iu6kqO4L0KQ?t=1471 In 1989, Eigler was the first to use a scanning tunneling microscope tip to arrange individual atoms on a surface, famously spelling out the letters "IBM" with 35 xenon atoms. He later went on to create the first quantum corrals, which are well-defined quantum wave patterns of small numbers of atoms, and nanoscale logic circuits using individual molecules of carbon monoxide. He shared the 2010 Kavli Prize in Nanoscience with Nadrian Seeman for these breakthroughs.[1] https://en.wikipedia.org/wiki/Don_Eigler
L&FP, 65e: Imaging light as a “wavicle” — both wave and particle kairosfocus

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