The new progress of optical particle poses a challenge to quantum theory

Scientists have discovered a new mechanism for creating paired light particles that could have a significant impact on the study of quantum physics.

Researchers at the University of East Anglia (UEA) have shown that photons are always present in pairs as the basic constituent particles of light, and the appearance of such particle pairs can be from different locations rather than always the same location .

This breakthrough research may be of great significance to quantum physics, which is the theoretical basis of modern physics. So far, the general assumption is that such photon pairs inevitably originate from a single point in space.

Quantum entanglement, that is, when particles are so closely linked, that one particle directly affects another particle has been widely used in a variety of laboratory processes, from quantum cryptography to quantum teleportation.

A team at the University of East Anglia is studying a process called spontaneous parametric downconversion (SPDC) in which photon beams create entangled photons through the crystal.

Professor David Andrews, of the Faculty of Chemistry at the University of East Anglia, said: "When excited particles evenly divide energy into energy, it's called degraded downconversion or digital downconversion."

"Until now it has been assumed that the paired photons come from the same place, and the identification of a new, non-localized institution now shows that each photon emits at a point that can be spatially separated, introducing a new fundamental quantum Uncertainty about the location of origin. "

The entanglement of each pair of quantum states has an important application in quantum computing, a theoretical computing system that may enable the big data problem to be handled with incredible speed, as well as other areas of quantum physics.

The findings are also significant because they limit the spatial resolution. Professor Andrews said: "Everything has a certain amount of quantum 'ambiguity'. Photons are not the hard-and-small bullet in the light that people commonly imagine."

The study of the generation of associated photon pairs in the conversion process under degenerated degeneracy was conducted by Kayn A. Forbes, Jack S. Ford, and David L. Andrews worked together and published the research in the Physical Review Letters magazine.

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