Tag Archives: Liquid Helium

Gamma-ray laser moves a step closer to reality

by Iqbal Pittalwala, Phys.org

A physicist at the University of California, Riverside, has performed calculations showing hollow spherical bubbles filled with a gas of positronium atoms are stable in liquid helium.

The calculations take scientists a step closer to realizing a gamma-ray laser, which may have applications in medical imaging, spacecraft propulsion, and cancer treatment.

Continue reading Gamma-ray laser moves a step closer to reality

Physicists have simulated a ‘superfluid’ black hole that acts like liquid helium

by Bec Crew, Science Alert

Like nothing we’ve seen in our Universe

Black holes are strange enough as it is, but new simulations point to the existence of a black hole in another universe that mimics the behaviour of a bizarre type of liquid that climbs walls and flows uphill.

This ‘superfluid black hole’ is the result of physicists modelling a theoretical black hole that behaves in a way that’s mathematically identical to liquid helium when it enters a superfluid state, and they say it’s so strange, our entire Universe probably couldn’t support it. Continue reading Physicists have simulated a ‘superfluid’ black hole that acts like liquid helium