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How could a solid be superfluid?

Sébastien Balibar, Physics 1, 16 (2008) – Published August 25, 2008

Experiments indicate that, as in a superfluid, mass can flow through solid helium-4 without viscous resistance. Recent calculations shed light on how this may happen thanks to defects in the crystal lattice.

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Supersolid, with a Twist

Phys. Rev. Focus 20, 3 (2007) – Published July 16, 2007

According to computer simulations, atoms in solid helium can flow without friction when arranged in a regular, spiral structure.

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Two Quantum States for the Price of One

Phys. Rev. Focus 16, 11 (2005) – Published October 6, 2005

Liquid hydrogen can be a superconductor, a superfluid, or both, according to computer simulations.

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Unraveling a Twisted Tale

Phys. Rev. Focus 16, 3 (2005) – Published July 20, 2005

Although the transition from smooth flow to turbulence is notoriously complex in normal fluids, researchers have now seen it in a superfluid.

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Odd Particle Out

Phys. Rev. Focus 15, 1 (2005) – Published January 5, 2005

A hybrid state of matter that includes both superfluid and normal fluid should be stable, according to new calculations. The theory predicting the state was controversial.

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