Questions tagged [cpt-symmetry]
The cpt-symmetry tag has no usage guidance.
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CPT invariance in Dirac Bilinears
I am currently working on exercise 3.7c of Peskin and Schroeder's An Introduction to Quantum Field Theory. The problem statement is:
Show that any Hermition, Lorentz scalar local operator built from $...
user261609
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How does CPT symmetry hold while Charge, Parity and Time can all be violated?
To get it straight, Charge symmetry can be broken by U-236 atoms, Parity can be broken by K-one atoms and Time symmetry can be broken by quarks. So, how do they together hold true?
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Does time symmetry cause the matter/antimatter asymmetry?
It’s known that the fundamental laws of physics are time symmetric. In electromagnetism $t$ can be changed to $-t$ and time reversal is also valid in particle physics, as there is the CPT symmetry.
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Negative energy quanta vs antimatter approach
Consider 2 physical scenarios:
$t_{-1}$
$t_0$
$t_1$
Sc.1
electron and positron approached
electron and positron annihilated
photons emitted
Sc.2
electron is free
electron emits some photons
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Electromagnetism and CPT simmetry
I'm having some trouble understanding the CPT theorem and in particular the time reversal part.
Let's consider for example an electron and a positron on the x axis, with the electron on the left and ...
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Critique on various ways to think about time reversal transformation on Schrodinger equation?
Please define how time-reversal symmetry act on Schrodinger equation $i \frac{\partial}{\partial t} |\Psi{}(t) \rangle = H(t) |\Psi{}(t) \rangle.$ (for general form: which can be relativistic such as ...
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Charge Conjugation to Analyze CPT Invariance
Source: http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/cpt.html#:~:text=Charge%20conjugation(C)%3A%20reversing,like%20momentum%20and%20angular%20momentum.
In the image below, reaction (1) shows ...
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Can one-electron world theory be revived if the Sakharov's conditions are completely met?
Regarding that people object about the matter antimatter balance in the one-electron world theory to discard it, can it be once more revived if the Sakharov's conditions are met so that the matter ...
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Examples of the vacuum $| 0 \rangle$ break C, P, T symmetry?
Can the vacuum $| 0 \rangle$ of some QFT break C, P, T symmetry?
It could be that the QFT break C, P, T symmetry explicitly. Are there good examples?
p.s. The weak interaction breaks P explicitly ...
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Define $C,P,T$ symmetry transformation in even dimensional $d$ spacetime on a relativistic Weyl fermion theory
According to https://physics.stackexchange.com/a/488388/42982 we can define $C,P,T$ discrete symmetry transformation in even dimensional spacetime.
How could we write $C,P,T$ symmetry transformation ...
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Does the time reversal flip the differential measure $dt$?
Does the time reversal flip the differential measure $dt$ or integral measure $dt$?
Does the time reversal flip the differential measure $dt$ or $\Delta t$?
Suppose we look at the derivative on a ...
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Does the presence of magnetic monopole break the time reversal, or does its magnetic charge flip (more naturally)?
It is often said that the presence of magnetic field breaks the time reversal symmetry (see Sakurai quantum mechanics book p.285), because the Lorentz force law shows
$$
\vec F = q(\vec E + \vec v \...
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Difference between non-Hermitian and PT-symmetric systems [closed]
Can anyone explain me the difference between non-Hermitian and PT-symmetric systems (in terms of the Hamiltonian)? Are they two mutually exclusive things?
user274797
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Why reflection is generator of Minkowski space, if we know that only CPT symmetry is true?
In particular, we know that $P$ symmetry (parity transformation, which is basically a reflection), is not the symmetry of the universe, a whole combination of $C$, $P$, and $T$ is. Because of this, it'...
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How can we detect antihydrogen?
From a mathematical standpoint (CPT symmetry) it is most probable that antihydrogen has the same spectra (absorption and emission) as hydrogen. The CERN confirmed this hypothesis to a high accuracy ...
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