Dynamics of entanglement in expanding quantum fields
We develop a functional real-time approach to computing the entanglement between spatial regions for Gaussian states in quantum field theory. The entanglement entropy is characterized in terms of local correlation functions on space-like Cauchy hypersurfaces. The framework is applied to explore an e...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
April 27, 2018
|
| In: |
Journal of high energy physics
Year: 2018, Issue: 4 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP04(2018)145 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1007/JHEP04(2018)145 Verlag, Volltext: https://link.springer.com/content/pdf/10.1007%2FJHEP04%282018%29145.pdf 
|
| Author Notes: | Jürgen Berges, Stefan Floerchinger and Raju Venugopalan |
| Summary: | We develop a functional real-time approach to computing the entanglement between spatial regions for Gaussian states in quantum field theory. The entanglement entropy is characterized in terms of local correlation functions on space-like Cauchy hypersurfaces. The framework is applied to explore an expanding light cone geometry in the particular case of the Schwinger model for quantum electrodynamics in 1+1 space-time dimensions. We observe that the entanglement entropy becomes extensive in rapidity at early times and that the corresponding local reduced density matrix is a thermal density matrix for excitations around a coherent field with a time dependent temperature. Since the Schwinger model successfully describes many features of multiparticle production in e+e− collisions, our results provide an attractive explanation in this framework for the apparent thermal nature of multiparticle production even in the absence of significant final state scattering. |
|---|---|
| Item Description: | Gesehen am 21.06.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP04(2018)145 |