Heavy operators and hydrodynamic tails
The late time physics of interacting QFTs at finite temperature is controlled by hydrodynamics. For CFTs this implies that heavy operators -- which are generically expected to create thermal states -- can be studied semiclassically. We show that hydrodynamics universally fixes the OPE coefficien...
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2020-09-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.9.3.034 |
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doaj-33b5eca5746044888cbb0981473cf0662020-11-25T03:47:06ZengSciPostSciPost Physics2542-46532020-09-019303410.21468/SciPostPhys.9.3.034Heavy operators and hydrodynamic tailsLuca V. DelacretazThe late time physics of interacting QFTs at finite temperature is controlled by hydrodynamics. For CFTs this implies that heavy operators -- which are generically expected to create thermal states -- can be studied semiclassically. We show that hydrodynamics universally fixes the OPE coefficients $C_{HH'L}$, on average, of all neutral light operators with two non-identical heavy ones, as a function of the scaling dimension and spin of the operators. These methods can be straightforwardly extended to CFTs with global symmetries, and generalize recent EFT results on large charge operators away from the case of minimal dimension at fixed charge. We also revisit certain aspects of late time thermal correlators in QFT and other diffusive systems.https://scipost.org/SciPostPhys.9.3.034 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Luca V. Delacretaz |
| spellingShingle |
Luca V. Delacretaz Heavy operators and hydrodynamic tails SciPost Physics |
| author_facet |
Luca V. Delacretaz |
| author_sort |
Luca V. Delacretaz |
| title |
Heavy operators and hydrodynamic tails |
| title_short |
Heavy operators and hydrodynamic tails |
| title_full |
Heavy operators and hydrodynamic tails |
| title_fullStr |
Heavy operators and hydrodynamic tails |
| title_full_unstemmed |
Heavy operators and hydrodynamic tails |
| title_sort |
heavy operators and hydrodynamic tails |
| publisher |
SciPost |
| series |
SciPost Physics |
| issn |
2542-4653 |
| publishDate |
2020-09-01 |
| description |
The late time physics of interacting QFTs at finite temperature is controlled
by hydrodynamics. For CFTs this implies that heavy operators -- which are
generically expected to create thermal states -- can be studied
semiclassically. We show that hydrodynamics universally fixes the OPE
coefficients $C_{HH'L}$, on average, of all neutral light operators with two
non-identical heavy ones, as a function of the scaling dimension and spin of
the operators. These methods can be straightforwardly extended to CFTs with
global symmetries, and generalize recent EFT results on large charge operators
away from the case of minimal dimension at fixed charge. We also revisit
certain aspects of late time thermal correlators in QFT and other diffusive
systems. |
| url |
https://scipost.org/SciPostPhys.9.3.034 |
| work_keys_str_mv |
AT lucavdelacretaz heavyoperatorsandhydrodynamictails |
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