Undergrad Can two photons combine to give a local field with spin 2?

  • Thread starter Thread starter south
  • Start date Start date
  • Tags Tags
    Photons Spin
Click For Summary
Two photons cannot combine to create a local field with spin 2 due to the absence of direct photon-photon interactions and the lack of a photon-photon bound state. The discussion emphasizes that there is no equivalent to a hydrogen atom for photons. Up conversion is mentioned as a related concept, but the details are not explored. The consensus is clear that photons do not interact in a way that would allow for such a combination. Overall, the topic highlights fundamental limitations in photon interactions.
south
Messages
91
Reaction score
20
TL;DR
Can two photons combine to give a local field with spin 2
Can two photons combine to give a local field with spin 2
 
Physics news on Phys.org
No. They cannot. There is no direct photon-photon interaction, nor a photon-photon bound state (similar to a hydrogen atom, for example).
 
Thank you very much dextercioby for attend me. Best regards.
 
dextercioby said:
No. They cannot. There is no direct photon-photon interaction, nor a photon-photon bound state (similar to a hydrogen atom, for example).
What about up conversion? (Opposite of down conversion). Admittedly I don’t know much about that other than the name.
 

Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?
View full post »

Similar threads

Graduate Coleman: "Spin is a concept that applies only to particles with mass"
  • · Replies 11 ·
Replies
11
Views
1K
Undergrad Why can’t photons “pile up” to eject an electron?
  • · Replies 3 ·
Replies
3
Views
698
Undergrad Is the photon field a vector field and a gauge field?
  • · Replies 6 ·
Replies
6
Views
2K
High School Polarization of a single photon
  • · Replies 10 ·
Replies
10
Views
4K
Undergrad Bell tests: Changing detector settings "just before photon arrives"
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Can an electron in a magnetic field radiate a virtual photon?
  • · Replies 3 ·
Replies
3
Views
2K
High School How are the spins of two entangled photons measured at light speed?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Spin operator and spin quantum number give different values, why?
  • · Replies 12 ·
Replies
12
Views
3K
High School Virtual photons as force carriers
  • · Replies 29 ·
Replies
29
Views
3K
High School Does a photon contain a pair of spinning charges?
  • · Replies 9 ·
Replies
9
Views
2K