Causal Fermion System and revival of Dirac Sea

In summary, the conversation discussed the possibility of the Dirac Sea, a concept proposed by physicist Paul Dirac, and its relation to the Higgs Field. While the Higgs Field's existence does not have any implications for the Dirac Sea, there is a recent revival of the concept through the theory of causal fermion systems. However, this is still a speculative hypothesis and any further discussion should be done in the Beyond the Standard Model forum.
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jtlz
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4
If the Higgs Field could exist with constant 246GeV across all of space. How come the Dirac Sea couldn't exist? If the Universe can easily accommodate Higgs Field.. why not Dirac Sea for all particles.

Also how does the Dirac Sea of bosons work? Like W+, W-? Any idea?

I was asking about the classical Dirac Sea.

For modern Dirac Sea, there seems to be a revival
https://en.wikipedia.org/wiki/Dirac_sea

"Dirac's original concept of a sea of particles was revived in the theory of causal fermion systems, a recent proposal for a unified physical theory. In this approach, the problems of the infinite vacuum energy and infinite charge density of the Dirac sea disappear because these divergences drop out of the physical equations formulated via the causal action principle.[9] These equations do not require a preexisting space-time, making it possible to realize the concept that space-time and all structures therein arise as a result of the collective interaction of the sea states with each other and with the additional particles and "holes" in the sea."

What is the consensus of the experts? Is there no possibility for Dirac's original concept to be viable?

How about Causal Fermion Systems? What do you think of it? What flaws can you see here that can bury the whole (old and modern idea of) Dirac Sea for good?
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Thread closed temporarily to address a post report...
 
  • #3
jtlz said:
If the Higgs Field could exist with constant 246GeV across all of space. How come the Dirac Sea couldn't exist?

There are no useful similarities between the two, so the Higgs field's existence says nothing whatever about the possibility or impossibility of the Dirac Sea's existence.

jtlz said:
how does the Dirac Sea of bosons work?

It doesn't. The whole concept of the "Dirac Sea" could only apply to fermions, since it relied on the Pauli exclusion principle. However, for many good reasons, the concept has been abandoned.

jtlz said:
For modern Dirac Sea, there seems to be a revival

Not of Dirac's original concept; the "causal fermion systems" hypothesis avoids a number of the difficulties with Dirac's original concept. However, that is still a speculative hypothesis at this point, and any discussion of it belongs in the Beyond the Standard Model forum (with appropriate citations to actual peer-reviewed papers discussing it). Please start a new thread there if you want to discuss that hypothesis (and please avoid referring to any similarities with the original Dirac sea concept, since they have nothing to do with the actual physics of the new hypothesis).
 
  • #4
The OP question has been answered. The thread will remain closed.
 

FAQ: Causal Fermion System and revival of Dirac Sea

What is a Causal Fermion System?

A Causal Fermion System (CFS) is a mathematical framework that describes the fundamental building blocks of space and matter. It is based on the concept of a Dirac Sea, which is a hypothetical sea of negative energy states that serves as the foundation for the creation of particles and antiparticles.

How does the CFS revive the Dirac Sea?

The CFS introduces a new mathematical structure that allows for the revival of the Dirac Sea. This structure, known as the Fermionic Projector, describes how fermions (particles with half-integer spin) emerge from the negative energy states of the Dirac Sea. This revival of the Dirac Sea is essential for understanding the origin of matter and the fundamental laws of physics.

What implications does the CFS have for our understanding of the universe?

The CFS has significant implications for our understanding of the universe. It provides a new perspective on the fundamental nature of space and matter, and it offers a unified description of gravity and quantum mechanics. It also has the potential to explain the origin of dark matter and other mysteries of the universe.

How is the CFS related to quantum field theory?

The CFS is a generalization of quantum field theory, which is the current framework for describing the behavior of particles and fields at the subatomic level. The CFS extends this framework to include the Dirac Sea and provides a more complete and mathematically consistent description of the fundamental interactions in the universe.

Are there any experimental tests of the CFS?

At this point, there are no direct experimental tests of the CFS. However, the framework has been shown to be mathematically consistent and has made predictions that are in line with current experimental data. Further research and experimentation are needed to fully test the implications of the CFS on our understanding of the universe.

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