Related Experiment Video
Updated: Jun 8, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Non-Pauli transitions from spacetime noncommutativity
A P Balachandran1, Anosh Joseph, Pramod Padmanabhan
1Department of Physics, Syracuse University, Syracuse, New York 13244-1130, USA.
Physical Review Letters
|September 28, 2010
Summary
Noncommutative spacetimes, potentially relevant at the Planck scale, may be influenced by cosmic motion. This suggests a new energy scale beyond the Planck scale, impacting quantum theory.
Area of Science:
- Quantum Field Theory
- Cosmology
- Theoretical Physics
Background:
- Noncommutative spacetimes are explored in quantum theory, often controlled by fixed tensors like θμν for Moyal spacetime.
- Poincaré invariance in these theories deforms the symmetrization of identical particle states.
Purpose of the Study:
- To investigate the impact of cosmic motion on Pauli-forbidden processes in noncommutative spacetimes.
- To infer the energy scale associated with spacetime noncommutativity.
Main Methods:
- Analyzing the effects of Earth's rotation and cosmic movements as sudden events.
- Examining the induction of twisted bosonic components in spinorial particle states.
- Utilizing known limits on non-Pauli transitions.
Main Results:
- Cosmic motion can induce non-Pauli transitions in identical spinorial particles.
- The inferred energy scale for noncommutativity is approximately 10^24 TeV.
Conclusions:
- The findings suggest a new energy scale significantly beyond the Planck scale.
- This research opens avenues for exploring quantum gravity and fundamental physics.
Related Concept Videos
03:06The Pauli Exclusion Principle
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
01:17Space-Time Curvature and the General Theory of Relativity
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of motion,...
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of motion,...
01:08NMR Spectroscopy: Spin–Spin Coupling
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved in...
02:32The de Broglie Wavelength
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
01:08Spin–Spin Coupling Constant: Overview
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
01:27¹H NMR: Long-Range Coupling
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.