CPT Violation and Decoherence in Quantum Gravity

We show a simple mechanism for a dynamical CPT violation in the neutron sector. In particular, we show a CPT-violating see-saw mechanism, generating a Majorana mass and a CPT-violating mass for the neutron. CPT-violating see-saw involves a sterile partner of the neutron, living in a hidden sector, in which CPT is spontaneously broken. In particular, neutrons (antineutrons) can communicate with the hidden sector through nonperturbative quantum gravity effects called exotic instantons. Exotic instantons dynamically break R-parity, generating one effective vertex between the neutron and its sterile partner. In this way, we show how a small CPT-violating mass term for the neutron is naturally generated. This model can be tested in the next generation of experiments in neutron–antineutron physics. This strongly motivates researches of CPT-violating effects in neutron–antineutron physics as a test-bed for dynamical CPT-violations in SM.

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Classicality, Matter–Antimatter Asymmetry, and Quantum Gravity Deformed Uncertainty Relations

Modern Physics Letters A ◽

10.1142/s0217732397001412 ◽

1997 ◽

Vol 12 (19) ◽

pp. 1387-1392 ◽

Cited By ~ 9

Author(s):

Giovanni Amelino-Camelia

Keyword(s):

Quantum Gravity ◽

Recent Work ◽

Quantum Decoherence ◽

Uncertainty Relations ◽

Cpt Violation ◽

Classical Behavior

Some of the recent work on quantum gravity has involved modified uncertainty relations such that the products of the uncertainties of certain pairs of observables increase with time. It is here observed that this type of modified uncertainty relations would lead to quantum decoherence, which could explain the classical behavior of macroscopic systems, and CPT-violation, which could provide the seed for the emergence of a matter–antimatter asymmetry.

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Lorentz violation and vacuum structure in string theories

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514602749 ◽

2014 ◽

Vol 30 ◽

pp. 1460274 ◽

Cited By ~ 1

Author(s):

Koji Hashimoto

Keyword(s):

Quantum Gravity ◽

Lorentz Violation ◽

Space Time ◽

Cpt Violation ◽

Superstring Theory ◽

Vacuum Structure ◽

String Theories

We briefly describe what is expected in superstring theory for the Lorentz violation and related CPT violation, for non-experts. Superstring theory is an advanced theory for quantum gravity, but we are still not at a stage of evaluating possible Lorentz violations, although there are proposals for compactification mechanisms of space-time.

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Foundations of Quantum Gravity

10.1017/cbo9780511919909 ◽

2009 ◽

Cited By ~ 3

Author(s):

James Lindesay

Keyword(s):

Quantum Gravity

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Topology knots and hierarchy problem

10.31219/osf.io/7tqrw ◽

2019 ◽

Author(s):

Vitaly Kuyukov

Keyword(s):

Quantum Theory ◽

String Theory ◽

Quantum Gravity ◽

Dimensional Space ◽

Space Time ◽

Elementary Particles ◽

Hierarchy Problem ◽

Topological Quantum ◽

Dimensional Space Time ◽

New Formula

Many approaches to quantum gravity consider the revision of the space-time geometry and the structure of elementary particles. One of the main candidates is string theory. It is possible that this theory will be able to describe the problem of hierarchy, provided that there is an appropriate Calabi-Yau geometry. In this paper we will proceed from the traditional view on the structure of elementary particles in the usual four-dimensional space-time. The only condition is that quarks and leptons should have a common emerging structure. When a new formula for the mass of the hierarchy is obtained, this structure arises from topological quantum theory and a suitable choice of dimensional units.

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