Scientists Create First Ever "Supersolid" From Light: Here’s Why It Matters

For the first time, scientists have turned light into a "'supersolid,"' which is an unusual form of matter that exhibits properties of both solids and liquids simultaneously.

Even though scientists had previously created supersolids using atoms, this marks the first time they've combined light and matter to produce such a state, thereby opening up fresh avenues for exploring condensed-matter physics. This breakthrough was detailed in a research paper released on March 5 in the journal. Science .

However, what precisely constitutes a supersolid, and why is this recent advancement causing such excitement? Below is all the information you require.

What is a supersolid?

Supersolids are a strange state of matter defined by quantum mechanics Where particles come together to form an ordered, crystalline solid yet exhibit movement similar to a fluid with zero viscosity. Viscosity measures a material’s resistance to flow due to internal friction; typically, fluids with higher viscosity do not flow as easily. Normally, solids remain static without changing shape or volume, whereas supersolids can alter both their orientation and density based on particle interactions while still retaining a structured lattice formation.

Why do supersolids remain so frigid?

Supersolids need extremely cold temperatures to form — typically very near absolute zero (at -459.67°F or -273.15°C). In this scenario, most particles must inhabit the lowest possible energy level, whereas heat causes them to bounce around much like hyperactive children in a bouncy castle.

When a substance reaches an extremely low temperature, traditional thermal effects cease to mask the interactions between particles. Consequently, subtle quantum mechanical influences take precedence in determining the behavior of the material.

Picture this: The toddlers have left and the ball pit has become tranquil. We now have the chance to examine undisturbed how the various elements within the ball pit interrelate, thus shaping its overall properties.

Related: 32 physics experiments that transformed our understanding of the world

In what way could a fluid possess zero viscosity?

Viscosity quantifies the ease with which a liquid can alter its form. Liquids exhibiting high viscosity adhere more closely to themselves and thus oppose motion; for instance, syrup pours slowly out of a bottle as opposed to the rapid flow of water coming directly from a faucet. With the exception of superfluids and supersolids, all liquids possess at least some degree of viscosity.

The most well-known instance of a fluid lacking viscosity is helium chilled to temperatures just above absolute zero. Even at absolute zero, particles do not remain entirely motionless; instead, they exhibit minimal movement due to this phenomenon. the uncertainty principle In the instance of the helium-4 isotope, they move quite vigorously — so much so that a sample of helium-4 cannot freeze at absolute zero without approximately 25 atmospheres of pressure being exerted to force the particles close together.

At absolute zero, Helium-4 exhibits unusual movements due to various quantum effects, leading to significant alterations in its behavior. The liquid loses all friction (which means it has no viscosity) and can rapidly escape from vessels, along with displaying other peculiar characteristics.

What methods can we use to turn light into a solid substance?

Supersolids have been made from atomic gases Previously. However, the latest study employed a innovative approach based on the characteristics of "polariton" systems.

Polaritons arise from the interaction between photons (light) and quasiparticles such as excitons via robust electromagnetic forces. These entities have characteristics enabling them to collapse into their lowest potential energy configuration akin to certain types of gaseous atoms. Essentially, this involves combining light with matter, which then coalesces into what is known as a supersolid.

Why are supersolids useful?

Supersolids are crucial for investigation as they demonstrate the impact of minute quantum interactions among particles free from thermal interference. By examining their properties and behaviors, we gain insights into the assembly and structure of atoms and particles themselves. This exploration provides foundational knowledge about our universe.

Through further study and innovation, supersolids might find applications in various fields. quantum computing , superconductors Seamlessly lubricated materials, along with applications we've barely started considering. The multitude of opportunities awaiting our discovery is vast—and crafting a supersolid from light represents significant progress.