# Strings on the lattice and AdS/CFT

## TL;DR

This paper introduces a new auxiliary field approach for the four-fermi term in the superstring action on AdS/CFT, analyzing fermionic spectra and sign ambiguities, with initial measurements discussed for future detailed results.

## Contribution

It proposes a novel auxiliary field representation for the four-fermi term in the superstring action, facilitating analysis of fermionic fluctuations in AdS/CFT.

## Key findings

- Identification of parameter regions without sign ambiguity
- Initial measurements of observables in the new framework
- Analysis of fermionic operator spectrum

## Abstract

We present a new auxiliary field representation for the four-fermi term of the gauge-fixed Green-Schwarz superstring action which describes fluctuations around the null-cusp background in $AdS_5\times S^5$. We sketch the main features of the fermionic operator spectrum, identifying the region of parameter space where the sign ambiguity is absent. Measurements for the observables in the setup here described are presented and discussed in a forthcoming publication.