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The conceptual diagram shows that under certain conditions, photons can be combined into a "diatomic molecule" state. The middle dumbbell represents that two photons are combined in the form of waves separated by a certain distance.
In the past, people believed that the lightsaber used by the Jedi in Star Wars was a plasma that was confined by magnetic fields rather than photons. A research team consisting of scientists from the National Institute of Standards and Technology (NIST) and several universities in Maryland recently discovered that massless light particles can be combined into a kind of “molecule†through their own special forces, though they can not reach the light. The degree of the sword is a step toward the construction of objects with light.
In 2013, scientists from Harvard University, Caltech University, and Massachusetts Institute of Technology collaborated to find a way to successfully combine two photons together during the light flight and make one “sit†on top of the other. overlapping. The experiment was considered a breakthrough because no one had previously been able to combine single photons.
The new discovery is based on the previous research of multiple teams. According to a report recently organized by the Physicists Organization Network, NIST teamed up with its peer team to theoretically prove that by adjusting only a few parameters in the bonding process, photons will “fly side by side†at a distance from each other, just like two hydrogens. The atoms combine into one hydrogen molecule. NIST's Alex Goshikov said: "In essence, this is not a molecule, but it has a similar structure. We are learning how to construct a complex light state, and then build more complex objects. This is the first This shows how to combine two photons with a finite distance."
As for the question of whether or not a light saber can be created after the creation of light molecules, Goshkov believes that this is unlikely in the short term, mainly because the extreme conditions required to combine photons cannot be used with ordinary experimental equipment. Achieved, but creating light molecules is useful in other ways.
If the interaction between photons can be designed, many techniques from communication to high-definition imaging will be greatly improved. For instruments used to precisely calibrate light sensors, new discoveries have made it easier to create a “standard brightness†that emits an accurate number of photons when detected. In industry, combining and entangling photons is expected to create a "photonic computer" that uses photons as information processing, and data transmission and processing can be directly operated by photons, which will reduce a lot of energy consumption.
The related papers will be published in the recent Physical Review Letters. (Reporter Chang Lijun)
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