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The bridge between quantum mechanics and general relativity is still possible



  The bridge between quantum mechanics and general relativity is still possible
Experimental scheme for gravity test induced by entanglement detergency Credit: provided by the University of Science and Technology of China

Quantum mechanics and general relativity are the basis of the current understanding of physics ̵

1; but the two theories do not seem to work together. Physical phenomena rely on the relationship of motion between what is observed and the observer. Certain rules apply to all kinds of observable objects and those observing, but these rules tend to break down to a quantum level where subatomic particles behave in strange ways.


An international team of researchers developed a unified framework to explain this apparent disintegration between classical and quantum physics, and they tested it using a quantum satellite called Micius. They published their results excluding a version of their theory on September 19 in Science Science .

Mitius is part of a Chinese research project called Quantum Space Rock Experiments (QUESS) in which researchers can investigate the connection with quantum and classical physics through light experiments. In this study, the researchers used a satellite to produce and measure two entangled particles.

"Thanks to the advanced technology provided by Micius, for the first time in human history, we were able to perform a meaningful quantum optical experiment testing the fundamental physics between quantum theory and gravity," says Gian-Wei Pan, paper author and CAS director the Center for Excellence in Quantum Information and Quantum Physics at the University of Science and Technology of China

The Pan theory and team tested was that particles would decorate one another as they pass through separate gravitational regions of Different gravitational pulls would have produced a quantum interaction that behaved as classical relativism – a particle in less gravity would move with less constraint than that in stronger gravity. "Attempts to provide a coherent description of quantum fields, since they exist in exotic space-time that contains closed time-like curves, and a simple space held by general relativity. The formalism of events standardizes behavior in quantum and classical physics.

"If we observe the deviation, it would mean that the formalism of events is correct and that we must substantially re-examine our understanding of the interaction between quantum theory and gravity theory," said Pan, "However, in our experiment, we excluded the strong version of formalism.

The researchers do not see the particles deviate from the expected interactions predicted by the quantum understanding of gravity, but they plan to test a version of their a theory that allows a little more flexibility.

"We have ruled out the strong version of event formalism, but the modified model remains an open question," Pan said.

To test this version, Pan and the team will launch a new satellite that will orbit 20 to 60 times higher than Micius to test a wider field of gravity.


Listening to quantum radio


More information:
"Satellite testing of a gravitationally induced quantum decoherence model" Science (2019). science.sciencemag.org/lookup/… 1126 / science.aay5820

Provided by
Chinese University of Science and Technology

Reference :
The bridge between quantum mechanics and general relativity is still possible (2019, September 19)
Downloaded September 19, 2019
from https://phys.org/news/2019-09-bridge-quantum-mechanics-relativity.html

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