20.500.12556/RUL-124027
Out-of-horizon correlations following a quench in a relativistic quantum field theory
One of the manifestations of relativistic invariance in non-equilibrium quantum field theory is the “horizon effect” a.k.a. light-cone spreading of correlations: starting from an initially short-range correlated state, measurements of two observers at distant space-time points are expected to remain independent until their past light-cones overlap. Surprisingly, we find that in the presence of topological excitations correlations can develop outside of horizon and indeed even between infinitely distant points. We demonstrate this effect for a wide class of global quantum quenches to the sine-Gordon model. We point out that besides the maximum velocity bound implied by relativistic invariance, clustering of initial correlations is required to establish the “horizon effect”. We show that quenches in the sine-Gordon model have an interesting property: despite the fact that the initial states have exponentially decaying correlations and cluster in terms of the bosonic fields, they violate the clustering condition for the soliton fields, which is argued to be related to the non-trivial field topology. The nonlinear dynamics governed by the solitons makes the clustering violation manifest also in correlations of the local bosonic fields after the quench.
quantum field theory
kvantna teorija polja
true
false
false
Angleški jezik
Slovenski jezik
Neznano
2020-12-21 12:13:01
2020-12-21 12:13:01
2022-09-04 03:57:12
0000-00-00 00:00:00
2020
0
0
32 str.
art. no. 224
Vol. 2020
Jul. 2020
0000-00-00
Zaloznikova
Objavljeno
NiDoloceno
0000-00-00
0000-00-00
0000-00-00
530.22
1029-8479
10.1007/JHEP07(2020)224
42999555
1314148
RAZ_Kukuljan_Ivan_2020.pdf
RAZ_Kukuljan_Ivan_2020.pdf
1
44D7B2D6B4343B990F54D6A158A02398
9e1dc7dffb1d7512ff455be9a5cd4a96867af90db9f65cecce320ec961f5ba34
7506bd94-a1bb-11eb-a523-00155dcfd717
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139406
https://link.springer.com/article/10.1007%2FJHEP07%282020%29224
1
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=140136
Fakulteta za matematiko in fiziko
0
0
0