Laserjäähdytystä
Laserjäähdytystä is a term in Finnish that translates to laser cooling. It is a process used to cool atoms or ions to extremely low temperatures, often close to absolute zero. This is achieved by using lasers to slow down the motion of the particles. When a photon from a laser beam is absorbed by an atom, it imparts a momentum kick that opposes the atom's motion. If the laser is tuned slightly below the atomic resonance frequency, the atom will preferentially absorb photons when moving towards the laser, effectively slowing it down. This process, repeated many times, can dramatically reduce the kinetic energy of the atoms, leading to very low temperatures.
Laser cooling techniques have been instrumental in various fields of physics, particularly in atomic physics, quantum