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# Quantum Gravity meets Lattice QFT

AdS/CFT has been one of the most fruitful approaches to analyse the qualitative aspects

of the dynamics of strongly interacting QFTs, most prominently QCD. As an approach to

understanding the early stage of high energy heavy ion collisions, but also proton-proton

collisions at LHC, it is, in fact, one of very few systematic approaches. However, it is not

clear how reliable the description is quantitatively, because QCD is not a ${\cal N}=4$,

supersymmetric, conformal, SU(N) gauge theory with infinite N and the QCD coupling

constant is of limited size. Individual contributions exist on both sides of the duality

calculating the size of the relevant corrections (like the perturbative calculation of quantum

corrections on the gravity side for finite N and finite coupling strength, the lattice simulation

of SU(N) gauge theories with N>3, the calculation of perturbative corrections from

non-conformality on the QFT side, lattice simulation with partial supersymmetry ...) but no

systematic effort. In addition, more general scenarios for gauge/gravity dualities have been

studied, extending beyond the realms of AdS, CFT, and string theory. The probability is high

that quantitative contact can only be made on the basis of non-perturbative calculations on

both sides, which is a very tall order. On the QFT side, lattice QFT is the best established

tool to do so, while on the quantum gravity side resummed string theory is the main

approach. In addition, there is an increased recent interest within loop quantum gravity in

holographic computations. The aim of the workshop is to bring some of the internationally

leading experts in these fields together, formulate a more systematic strategy, and realize a

few projects in the direction of a quantitative application of quantum gravity techniques to

QCD in subsequent months.

## Organizers

Norbert Bodendorfer | Regensburg University | |

Kristina Giesel | FAU erlangen | |

Masanori Hanada | Kyoto - Livermore & Stanford University | |

Marco Panero | INFN - Università di Torino | |

Andreas Schäfer | Regensburg Universität | |

Larry Yaffe | Seattle University |