Energy Spectra of Compressed Quantum States

Author(s): Daochen Wang Quantum algorithms for estimating the ground state energy of a quantum system often operate by preparing a classically accessible quantum state and then applying quantum phase estimation. Whether this approach yields quantum advantage hinges on the state’s energy spectrum, that is, the sequence of t… [Phys. Rev. Lett. 136, 070604] Published Fri Feb 20, 2026