- Direct and model-independent method of Luescher has been tremendously successful in the two-body sector, connecting two-particle spectra in a finite volume to scattering amplitudes. Is it realistic to assume that (the generalizations of) such method will be practical and successful in the three/four-body sectors too?
- Is matching the many-body calculations to LQCD energy levels the way forward? Is the ab initio many-body community ready to implement their methods in a finite volume and with arbitrary boundary conditions? What are the challenges and expectations in executing such program?
- What precision should LQCD physicists aim for the obtained energy eigenvalues to meet the precision goal of many-body observables evaluated in an ab initio nuclear calculation? Is it possible to isolate the uncertainties due to many-body techniques from those of imprecise interactions?
- Can the LQCD community be guided about the optimized volumes, BCs, etc. based on benchmark ab initio calculations in a finite volume?
- What are the observables that many-body physicists would like to receive a lattice input for soon? Are there quantities that are more sensitive than others to interactions and/or many-body techniques used?
- What are the prospects of evaluating finite-volume matrix elements in many-body calculations? How should we match them to lattice renormalized matrix elements?
- Background field methods come with many advantages in constraining the current matrix elements from LQCD. Are such methods easier to implement in many-body techniques too? Will the procedure of matching to LQCD results be straightforward?
- Are there quantities in the few-nucleon sector for which a nonperturbative inclusion of QED is a key while the phenomenological constraints are lacking? What about the isospin breaking effects? What is the prospect of LQCD+LQED calculations of nuclei?
- Can one reduce the signal to noise in lattice QCD multi-nucleon observables by better importance sampling such as sampling according to the correlation functions themselves?
- Can the adiabatic projection method be adapted to lattice QCD?
- Can lattice EFT simulations use better parallelization and GPUs to improve the speed and size of the simulations?