Questions tagged [quantum-field-theory]

Questions about the field of theoretical physics which combines classical field theories and quantum mechanics are combined. Also consider using the [mathematics] tag if necessary.

Filter by
Sorted by
Tagged with
1 vote
0 answers
42 views

How does a scalar field linked to dark matter affect the fine structure constant?

Olive & Pospelov (2001) "[hep-ph/0110377] Evolution of the Fine Structure Constant Driven by Dark Matter and the Cosmological Constant" https://arxiv.org/abs/hep-ph/0110377 propose that ...
user avatar
2 votes
0 answers
47 views

Is frame dragging expected to be quantized in a theory of quantum gravity?

Protons and electrons have angular momentum which is quantized. Would the angular momentum of black holes be quantized in quantum gravity? Would this then affect Hawking radiation?
user avatar
3 votes
1 answer
105 views

Scalar field displacement from the minimum of the potential gives rise to particles/dark matter, why?

The paper Lyman-alpha Constraints on Ultralight Scalar Dark Matter by Kobayashi et al. says, at the beginning of Section 3.1: A light scalar field stays frozen at its initial field value in the early ...
RenatoRenatoRenato's user avatar
0 votes
0 answers
57 views

How would you define "space" in GR (General Relativity) and in QFT (Quantum Field Theory)?

Is there a univocal definition of space that can be accepted in GR and in QFT? In GR space is actually "Spacetime", a 4-dimensional entity that includes time. In this case it's impossible to ...
NikoEraser's user avatar
1 vote
1 answer
81 views

Can a change in the density of interstellar and intergalactic quantum fields affect the Redshift of photons?

Using our solar system's heliosphere as an analagy to what is happening in our galaxy and even the universe as a whole, can light redshift with changes in quantum fields? The universe is constantly ...
Richard's user avatar
  • 49
1 vote
0 answers
54 views

Probability of collision of another bubble universe with our universe

This is rephrased from a previous question and expanding on it. Considering the model of an "inflating" universe which extends infinitely in past (and possibly future) time, constantly creating new ...
user1097111's user avatar
-1 votes
1 answer
48 views

Field excitement in quantum field theory? [closed]

How at the beginning of this universe the fields as proposed in quantum fields theory get excited?? How exactly these fields originated?
Abhinandan Angra's user avatar
1 vote
1 answer
427 views

Is a Gravastar with no horizon with ultracompact and extreme density possible?

Is that possible with some strange Quantum Effect could give rise to a completely new kind of a star? Gravastar(Gravitational Vacuum Star) an object hypothesized in astrophysics as an alternative to ...
malkesh2911's user avatar
2 votes
0 answers
56 views

Modifying Heisenberg's unified field theory with gravity [closed]

How would Hisenberg's unified field equations be represented if gravity is incorporated. Would it result in a case similar to the Heisenberg-Ivanenkov equation, or am I just confused here? I would ...
Spoilt Milk's user avatar
3 votes
2 answers
1k views

Higgs Bosons in the centre of Black holes or extremely large stars [closed]

With the discovery of the Higgs Boson as the mass carrier, what is the possibility at the centre of a black hole being so dense and gravity so infinite that the structure of a proton or neutron are ...
Roman's user avatar
  • 31
31 votes
5 answers
6k views

Quantum Mechanics after the detection of Gravitational Waves

Of course everyone knows by now of the detection of Gravitational waves But, since General Relativity and Quantum Mechanics don't get along, can we say now that this detection proves that Quantum ...
Odin's user avatar
  • 475
-1 votes
2 answers
217 views

why quantum gravity doesnot exist?

I am not an astrophysicist and not its student.All my knowledge about astronomy comes from you tube videos and discovery channel.From them i knew that to solve the mysteries of black hole both ...
guru karthik's user avatar
22 votes
4 answers
9k views

Black Hole / Hawking Radiation: Why only capture anti-particle?

I may have some specifics wrong here. If so, don't focus on those. Just focus on the general thrust of my question. I "understand" (cough) that particle/anti-particle pairs form spontaneously in ...
user3355020's user avatar
16 votes
1 answer
526 views

How exactly does inflation convert random gravity fluctuations into coherent gravitational waves?

In the course of this very enjoyable press announcement, it is mentioned that inflation can create gravity waves by amplifying gravity fluctuations. I do not properly understand this statement. I ...
Dilaton's user avatar
  • 809