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Cited by 173

The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.

Momentum-space entanglement and renormalization in quantum field theory

Open access
Balasubramanian, Vijay, McDermott, Michael B., Van Raamsdonk, Mark·2012·Physical Review D
DOI 10.1103/physrevd.86.045014
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Abstract

The degrees of freedom of any interacting quantum field theory are entangled in momentum space. Thus, in the vacuum state, the infrared degrees of freedom are described by a density matrix with an entanglement entropy. We derive a relation between this density matrix and the Wilsonian effective action obtained by integrating out degrees of freedom with spatial momentum above some scale. We argue that the entanglement entropy of and mutual information between subsets of field theoretic degrees of freedom at different momentum scales are natural observables in quantum field theory and demonstrate how to compute these in perturbation theory. The results may be understood heuristically based on the scale dependence of the coupling strength and number of degrees of freedom. We measure the rate at which entanglement between degrees of freedom declines as their scales separate and suggest that this decay is related to the property of decoupling in quantum field theory.

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Metadata

Authors
Balasubramanian, V., McDermott, M. B., & Van Raamsdonk, M.
Venue
Physical Review D
Publisher
American Physical Society (APS)
Published
2012-08-06
Volume
86
Issue
4
ISSN
  • 0556-2821 (ISSN-L)
  • 1550-7998
  • 1550-2368
DOI
10.1103/physrevd.86.045014
OpenAlex
W2048563620
Cited by
173
References
9
FWCI
6.48
Type
journal article
Language
en
Open access
green

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