A study involving quantum collapse model has shown that time is not uniform but has tiny fluctuations that put limits on its precision.
A study by physicists affiliated with the Foundational Questions Institute found that time exhibits tiny intrinsic uncertainties, which limit clock precision. The physicists add that these uncertainties do not affect the watch on your wrist or even the most precise atomic clocks built so far.
Physicists have long been seeking a unified theory that explains both quantum mechanics and gravity. Both these theories operate at vastly different scales. Quantum mechanics in the microscopic realm of subatomic particles, while Einstein’s general theory of relativity in the macroscopic realm of stars, galaxies, and even the universe. However, both these theories have very different approaches to time. In general relativity, time and space can be bent by objects with mass, whereas in the quantum realm, time is external and unaffected by the quantum system. Also, quantum mechanics is rich with paradoxes and contradictions, where particles can exist in multiple positions and configurations all at the same time, much unlike our macroscopic world, where everything can only occupy one position at a time. Quantum collapse modelPhysicists turn to the quantum collapse model to explain this conflict between the quantum and the real world. In the quantum realm, superposition states are mathematically described by wavefunctions. However, according to physicists, when tries to measure or observe them, the wavefunction collapses into one definite state that can be measured. Physicists have also been exploring quantum models in which wave functions collapse spontaneously, even when they are not being measured or observed. Such quantum models make concrete, testable predictions. Members of the FQxI, who are also reputed faculty members at some of the world’s prominent nuclear physics facilities in the world, collaborated to look deeply at different models of quantum collapse. One such model is the Diósi-Penrose model, which suggests that gravity is connected to wavefunction collapse. In a recently published paper, the researchers drew a quantitative link between the second such model, called Continuous Spontaneous Localization, and gravitational spacetime fluctuations. What did the study find? “What we did was to take seriously the idea that collapse models may be linked to gravity,” said Nicola Bortolotti, a Ph.D. student at the Enrico Fermi Museum and Research Center in Rome, Italy, who led the study. “And then we asked a very concrete question: What does this imply for time itself?”The study shows that if quantum collapse models are right, then time must exhibit a tiny intrinsic uncertainty. This would mean that clock precision has fundamental limits, no matter how small they are. “Once you do the calculation, the answer is clear and surprisingly reassuring,” added Bortolotti. The researchers, however, assure us that this uncertainty does not affect even the precision of the atomic clocks. “The uncertainty is many orders of magnitude below anything we can currently measure, so it has no practical consequences for everyday timekeeping,” said Catalina Curceanu, a member of FQxI and research director at the Laboratori Nazionali di Frascati of the National Institute for Nuclear Physics in Frascati, Italy. The research suggests that quantum physics could be part of a larger, more fundamental theory of physics, and that there may be connections between the field, gravity, and time that we have not yet explored. The research findings were published in the journal Physical Review Research.
Physics Quantum Collapse Model Quantum Physics Quantum Uncertainty Theory Of Relativity Time
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