Entanglement in QFT: Free Particle Decay

  • Thread starter Thread starter LarryS
  • Start date Start date
  • Tags Tags
    Entanglement Qft
Click For Summary
Entanglement in quantum field theory (QFT) can indeed be defined, particularly in the context of particle decay. When a free, massive particle decays into two other massive particles, these new particles exhibit entanglement in linear momentum. The discussion highlights that existing definitions of entanglement are primarily rooted in non-relativistic quantum mechanics. An example of this phenomenon can be found in the referenced paper, which provides further insights into QFT and entanglement. Understanding this relationship enhances the comprehension of particle interactions in a relativistic framework.
LarryS
Gold Member
Messages
358
Reaction score
33
All definitions of entanglement, that I have encountered, were expressed in the language of non-relativistic QM.

Suppose a free, massive particle decays into 2 other massive particles. The 2 new particles would be entangled in linear momentum. Can QFT define that type of entanglement? Any examples?

Thanks in advance.
 
Physics news on Phys.org
referframe said:
All definitions of entanglement, that I have encountered, were expressed in the language of non-relativistic QM.

Suppose a free, massive particle decays into 2 other massive particles. The 2 new particles would be entangled in linear momentum. Can QFT define that type of entanglement?
Yes.

referframe said:
Any examples?
See e.g.
http://xxx.lanl.gov/abs/1205.1992
 

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

High School Entangled quants inside a particle accelarator
  • · Replies 4 ·
Replies
4
Views
1K
Graduate How do entanglement experiments benefit from QFT (over QM)?
  • · Replies 473 ·
16
Replies
473
Views
31K
Graduate Is delayed choice remote entanglement of photons derived from TDSE?
  • · Replies 58 ·
2
Replies
58
Views
5K
Undergrad The general structure of relativistic QFTs
  • · Replies 87 ·
3
Replies
87
Views
8K
Graduate Can entanglement be detected in a single Bell pair?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad The "size" of entangled particles
  • · Replies 18 ·
Replies
18
Views
2K
Graduate What happens when entangled photons are split into different paths?
  • · Replies 41 ·
2
Replies
41
Views
6K
Undergrad After entanglement swapping, how can we verify the new entanglement?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Does spatial entanglement reduce total classical entropy?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Entangled particles in black hole decay?
  • · Replies 11 ·
Replies
11
Views
2K