For the first time, the speed at which quantum entanglement occurs was measured, requiring 232 attoseconds
Scientists from the Institute of Theoretical Physics at Vienna University of Technology, including Professor Joachim Burgdörfer and Assistant Professor Eva P. Brizziňová, have for the first time measured the speed at which quantum entanglement occurs. They found that entanglement does not happen instantaneously, but rather takes about 232 attoseconds (1 attosecond is an extremely short period of time, equivalent to one quintillionth of a second).
To achieve this, they used ultrafast laser pulses to strike atoms and eject an electron. Sometimes, this also causes another electron within the atom to transition to a higher energy level, connecting the two electrons, or entangling them.
Brizziňová explained that the electron leaving the atom spreads out like a wave in just a few attoseconds, and it is at this point that entanglement is formed. This discovery helps us better understand the origin of quantum entanglement and is crucial for building future quantum computers.
Original article: https://www.toutiao.com/article/1836147404263626/
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