Abstract We test the bootstrap approach for determining spectrum of one dimensional Hamiltonians. In this paper we focus on problems that have a two parameter search space in approach: double well and periodic potential associated with Mathieu equation. For well, compare bootstrapped energies contributions from perturbative non-perturbative results, finding good agreement. potentials, notice gi...

Bootstrapping in fully homomorphic encryption (FHE) over the integers is a homomorphic evaluation of the squashed decryption function suggested by van Dijk et al. The typical approach for the bootstrapping is representing the decryption function as a binary circuit with a fixed message space. All bootstrapping methods in FHEs over the integers use this approach; however, these methods require t...