Quenched coupling, entangled equilibria, and correlated composite operators [Elektronisk resurs] a tale of two<em> O(N)</em> models
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Banerjee, Souvik (författare)
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Engelsoy, Julius (författare)
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Larana-Aragon, Jorge (författare)
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Sundborg, Bo (författare)
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Thorlacius, Larus (författare)
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Wintergerst, Nico (författare)
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Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet (utgivare)
- Publicerad: 2019
- Engelska.
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Ingår i: Journal of High Energy Physics (JHEP). - 1126-6708. ; 8
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Sammanfattning
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- A macroscopic version of Einstein-Podolsky-Rosen entanglement is obtained by quenching a quadratic coupling between two O(N) vector models. A quench of the mixed vacuum produces an excited entangled state, reminiscent of purified thermal equilibrium, whose properties can be studied analytically in the free limit of the individual field theories. The decoupling of different wavelength modes in free field theory prevents true thermalisation but a more subtle difference is that the density operator obtained by a partial trace does not commute with the post-quench Hamiltonian. Generalized thermal behaviour is obtained at late times, in the limit of weak initial mixing or a smooth but rapid quench. More surprisingly, late-time correlation functions of composite operators in the post-quench free field theory share interesting properties with correlators in strongly coupled systems. We propose a holographic interpretation of our result.
Ämnesord
- Natural Sciences (hsv)
- Physical Sciences (hsv)
- Subatomic Physics (hsv)
- Naturvetenskap (hsv)
- Fysik (hsv)
- Subatomär fysik (hsv)
Genre
- government publication (marcgt)
Indexterm och SAB-rubrik
- AdS-CFT Correspondence
- Effective Field Theories
- Holography and condensed matter physics (AdS/CMT)
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