2021-06-18

The physicist cools a 10 kilogram object close to its ground state of motion

By yqqlm yqqlm

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The physicist cools a 10 kilogram object close to its ground state of motion

Scientists have previously developed methods to use supercooling technology to bring objects close to static. The result of the cooling effect is that the atom is in a state close to rest, or in a state that is scientifically called the “ground state of motion”. So far, only small objects, such as clouds or nanoscale objects composed of millions of atoms, can be placed in a pure quantum state. However, MIT researchers worked with teams of scientists from other organizations to cool a large, human-scale object close to its ground state of motion for the first time.

Scientists are very clear that the object they cool is not a tangible object located in one place, but the combined motion of four independent objects, which weigh about 40 kilograms. This will mean that the “object” that researchers can cool is estimated to have a mass of about 10 kilograms and about 800 million atoms. The measurement of these objects used the Laser Interferometer Gravitational Wave Observatory (LIGO), which was observed with extremely high accuracy.

The physicist cools a 10 kilogram object close to its ground state of motion(1)

Scientists can The movement is too cold to 77 Na Kelvin, which is very close to the ground state of 10 Na Kelvin predicted by the object. No one has ever observed how gravity acts on a massive quantum state before. They have demonstrated how to prepare kilogram-scale objects in a quantum state, opening the door to experimental research on how gravity affects large quantum objects.