PhysicsKnots made in a weird quantum fluid can last forever Shapes created by vortices in water often fall apart, but an odd quantum fluid made from ultracold atoms could support vortex knots that never lose their knottiness News
PhysicsThis test could reveal whether gravity is subject to quantum weirdness If gravity is a truly quantum entity, something as simple as measuring the strength of an object’s gravitational field should change its quantum state News