Ju, Chia-YiMiranowicz, AdamMinganti, FabrizioChan, Chuan-TsungChen, Guang-YinNori, Franco2022-06-062022-06-062022-06-062022-04-2510.1103/PhysRevResearch.4.023070https://infoscience.epfl.ch/handle/20.500.14299/188380WOS:000795898100007The formalism for non-Hermitian quantum systems sometimes blurs the underlying physics. We present a systematic study of the vielbeinlike formalism which transforms the Hilbert space bundles of non-Hermitian systems into the conventional ones, rendering the induced Hamiltonian to be Hermitian. In other words, any non-Hermitian Hamiltonian can be "transformed" into a Hermitian one without altering the physics. Thus we show how to find a reference frame (corresponding to Einstein's quantum elevator) in which a non-Hermitian system, equipped with a nontrivial Hilbert space metric, reduces to a Hermitian system within the standard formalism of quantum mechanics.Physics, MultidisciplinaryPhysicsexceptional pointsEinstein's quantum elevator: Hermitization of non-Hermitian Hamiltonians via a generalized vielbein formalismtext::journal::journal article::research article