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Mendes, R. V. (2019). Commutative or noncommutative spacetime? Two length scales of noncommutativity. Physical Review D, 99(12). doi:10.1103/physrevd.99.123006
The noncommutativity of the spacetime coordinates has been explored in several contexts, mostly associated with phenomena at the Planck length scale. However, approaching this question through deformation theory and the principle of stability of physical theories, one concludes that the scales of the noncommutativity of the coordinates and the noncommutativity of the generators of translations are independent. This suggests that the scale of the spacetime coordinates’ noncommutativity could be larger than the Planck length. This paper attempts to explore the experimental perspectives to settle this question, either in the lab or by measurements of phenomena of cosmological origin.
Public Lecture—Profiling the Invisible: Quantum Mechanics and the Unseen Universe
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Quantum Mechanics: Particles or Waves
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So anti-matter decays faster than matter due to the Left-handed Weak Force.
fascinating!!!
3 parts per 1000 and sometimes 3 parts per 100.
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