AI Insight
Superfluids are states of matter where particles act as a collective wave and flow without friction. When flowing past obstacles below a critical velocity, superfluids move around them without experiencing drag or slowing down. Above this threshold velocity, the superfluid state deteriorates and energy dissipates through ripples and vortices in the fluid.
Why it matters
Understanding superfluid behavior around obstacles has implications for quantum physics research and could advance technologies involving frictionless transport systems. The discovery that tiny objects can move against the flow in photonic superfluids may lead to new methods of manipulating light and matter at quantum scales.
Understand the Science
Superfluids are intriguing states of matter in which particles behave like a giant collective wave, allowing them to flow without any friction. When this fluid flows past a fixed obstacle at a velocity below a specific threshold, it moves around it without slowing down or exerting any drag. Above this critical velocity, however, the superfluid state starts to break down, and the energy from the flow dissipates in the form of ripples and vortices in the fluid.
Source: Tiny objects swimming in a superfluid of light move against the flow