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Ultrafast electron entanglement could be studied using helium photoemission
- A new theoretical analysis calculates the impact of quantum entanglement on the emission time of photoelectrons by physicists at Shenzhen University in China and the Vienna University of Technology in Austria.
- They focused on the ionization of helium relative to ground state by extreme ultraviolet pulses.
- The two potential pathways by which the photoelectron could be produced in this experiment were through either direct single-ionization or excitation ionization.
- The two emission pathways result in entangled states such that the two electrons are described by the same quantum wavefunction.
- The resultant observation is predicted using attosecond technology, such as RABBITT and streaking.
- A 500 as pulse as a pump and a 10 fs pulse as a probe may help to achieve higher resolution time intervals and photoionization detection.
- However, the production of XUV pulses required to test these predictions remains a significant issuer.
- There are two emission pathways possible for the production of a photoelectron, with entangled states produced as a consequence.
- A unique finding was that photoelectrons emitted via excitation ionisation were most likely to be detected around 200 as earlier than those emitted via direct single-ionisation.
- This experiment aims to develop new insights into the empirical character of physics observation and thus help to understand more composite structures such as atoms and molecules.
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