In ultra-low temperature physics, The Sisyphus Effect involves the use of specially selected laser

Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of photons. The term "laser" originated as an acronym for Light Amplification by Stimulated Emission of Radiation...

 light, hitting atoms from various angles to both cool and trap them in a potential well, effectively 'rolling' the atom down a hill of potential energy

Potential energy

In physics, potential energy is the energy stored in a body or in a system due to its position in a force field or due to its configuration. The SI unit of measure for energy and work is the Joule...

 until it has lost its kinetic energy

Kinetic energy

The kinetic energy of an object is the energy which it possesses due to its motion.It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes...

.

It is named in reference to the Greek mythological figure of Sisyphus

Sisyphus

In Greek mythology Sisyphus was a king punished by being compelled to roll an immense boulder up a hill, only to watch it roll back down, and to repeat this throughout eternity...

, a king punished in Tartarus by being cursed to roll a huge boulder up a hill.