As its name suggests, this device is built around concepts from quantum mechanics. The idea is that two carefully controlled particles of light (a.k.a. photonic dimers) can be used to create a powerful laser beam. The “quantum” part of the equation comes in when these two particles are entangled, which can help protect from some of the deleterious effects lasers can face in challenging environments—when charge is applied to one photon, it directly applies to the other.

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Can you guess what would happen if the lens is too fat? Select continue to find out. Select demo picture to see what a scene under these conditions might look like. Continue Back Continue Back If you guessed that when the lens is too fat that light is focussed in front of the retina, you were right. Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

“Photons encode information when they travel, but the travel through the atmosphere is very damaging to them,” Shen said in a press statement. “When two photons are bound together, they still suffer the effects of the atmosphere, but they can protect each other so that some phase information can still be preserved.”

“Quantum entanglement is a correlation between photons,” Shen said in a press statement. “We are trying to exploit the property of entanglement to do something innovative. The entanglement can do many things that we can only dream of — this is just the tip of the iceberg.”

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To see what would happen if the lens did not get fatter select continue. By the way, the technical term for this change in lens shape is accommodation. We frequently call it focusing. Continue Back If the lens can not properly focus light on the retina, the image will fall either behind or in front of the retina. Can you guess what would happen if the lens is too fat? Select continue to find out. Select demo picture to see what a scene under these conditions might look like. Continue Back Continue Back If you guessed that when the lens is too fat that light is focussed in front of the retina, you were right. Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

However, this ubiquitous technology isn’t without its shortcomings. Because lasers are essentially just the optical amplifications of light, they’re still subject to failing in adverse conditions—whether that be fog, extreme temperatures, or even just long distances.

(You can get a better idea of the change in lens shape by repeated selecting "continue" and "back" to alternate between graphic displays.) Continue When looking at nearby objects the lens gets fatter, causing the image of the object to be focused on to the retina in the fovea. To see what would happen if the lens did not get fatter select continue. By the way, the technical term for this change in lens shape is accommodation. We frequently call it focusing. Continue Back If the lens can not properly focus light on the retina, the image will fall either behind or in front of the retina. Can you guess what would happen if the lens is too fat? Select continue to find out. Select demo picture to see what a scene under these conditions might look like. Continue Back Continue Back If you guessed that when the lens is too fat that light is focussed in front of the retina, you were right. Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

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Now, scientists at Washington University in St. Louis and Texas A&M University are turning to quantum mechanics to solve these laser-based shortcomings. The research will be conducted thanks to a two-year, $1 million grant from the Defense Advanced Research Projects Agency (DARPA) and will be led by Washington University associate professor Jung-Tsung Shen, who hopes to develop a prototype device called a quantum photonic-dimer laser.

. Continue Back Continue Back If you guessed that when the lens is too fat that light is focussed in front of the retina, you were right. Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

By the way, the technical term for this change in lens shape is accommodation. We frequently call it focusing. Continue Back If the lens can not properly focus light on the retina, the image will fall either behind or in front of the retina. Can you guess what would happen if the lens is too fat? Select continue to find out. Select demo picture to see what a scene under these conditions might look like. Continue Back Continue Back If you guessed that when the lens is too fat that light is focussed in front of the retina, you were right. Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

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As you can probably imagine, entangling two photons isn’t exactly easy, especially since they don’t have a charge. Shen says he instead “glued” two different-colored photons together, which then exhibited the behavior of a blue photon. These entangled photons can then be tweaked to work optimally in fog, extreme temperatures, or any other adverse condition. This would be a huge boon for both communication and imaging, which can be specifically limited by atmosphere and distance.

Select continue to find out. Select demo picture to see what a scene under these conditions might look like. Continue Back Continue Back If you guessed that when the lens is too fat that light is focussed in front of the retina, you were right. Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

Light Amplification by Stimulated Emission of Radiation, otherwise known as the laser, fundamentally changed human society upon its introduction in the early 1960s. The uses for lasers seem almost endless, and have rearranged how we communicate, perform surgeries, and even pay for groceries. In other words, we very much live in the laser era.

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So, while the laser was no doubt a world-changing invention, it’s revolutionary introduction may only be the first chapter of its technological journal.

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Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

Select demo picture to see what a scene under these conditions might look like. Continue Back Continue Back If you guessed that when the lens is too fat that light is focussed in front of the retina, you were right. Is there a remedy for lens problems that do not allow light to be properly focused on the retina? Sure, select continue. Continue Back Many people wear contact lenses to help image light properly on to the retina. Another solution is for a person to wear glasses. This places a lens in front of the eye not on the cornea as is the case with contact lenses. A recent solution is to use a laser to reshape the cornea. this solution is possible only in some cases. Another optical problem is astigmatism. Back Go to beginning of this section Table of Contents Subject Index Table of Contents [When not using frames]

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Researchers around the world are busy applying quantum mechanical properties to classical technologies. Last year, a French research team reported that their “quantum radar”—which similarly uses quantum entanglement techniques—outperformed classical radar by 20 percent. Researchers are also hard at work creating a quantum internet that will one day transmit information in quantum state, which could increase security and improve the study of materials.

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Darren lives in Portland, has a cat, and writes/edits about sci-fi and how our world works. You can find his previous stuff at Gizmodo and Paste if you look hard enough.

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