Journal
SCIPOST PHYSICS
Volume 8, Issue 1, Pages -Publisher
SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.8.1.004
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Funding
- European Research Council [743032 DYNAMINT]
- European Union [75009]
- National Science Centre under SONATA [2018/31/D/ST3/03588]
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Within the generalized hydrodynamics (GHD) formalism for quantum integrable models, it is possible to compute simple expressions for a number of correlation functions at the Eulerian scale. Specializing to integrable relativistic field theories, we show the same correlators can be computed as a sum over form factors, the GHD regime corresponding to the leading contribution with one particle-hole pair on a finite energy-density background. The thermodynamic bootstrap program (TBP) formalism was recently introduced as an axiomatic approach to computing such finite-energy-density form factors for integrable field theories. We derive a new axiom within the TBP formalism from which we easily recover the predicted GHD Eulerian correlators. We also compute higher form factor contributions, with more particle-hole pairs, within the TBP, allowing for the computation of correlation functions in the diffusive, and beyond, GHD regimes. The two particle-hole form factors agree with expressions recently conjectured within the GHD.
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