  This work introduces a novel NISQ-friendly procedure for estimating spectral
gaps in quantum systems. By leveraging Adiabatic Thermalization, we are able to
create the Spectral Gap Superposition state, a newly defined quantum state
exhibiting observable fluctuations in time that allow for the accurate
estimation of any energy gap. Our method is tested by estimating the energy gap
between the ground and the first excited state for the 1D and 2D Ising model,
the Hydrogen molecule H2 and Helium molecule He2. Despite limiting our circuit
design to have at most 40 Trotter steps, our numerical experiments of both
noiseless and noisy devices for the presented systems give relative errors in
the order of $10^{-2}$ and $10^{-1}$. Further experiments on the IonQ Aria
device lead to spectral gap estimations with a relative error of $10^{-2}$ for
a 4-site Ising chain, demonstrating the validity of the procedure for NISQ
devices and charting a path towards a new way of calculating energy gaps.
