Observation of the non-Hermitian skin effect and Fermi skin on a digital quantum computer.

ABSTRACT: Lately, the non-Hermitian skin effect (NHSE) has been demonstrated in various classical metamaterials and even ultracold atomic arrays. Yet, its interplay with many-body dynamics have never been experimentally investigated. Here, we report the observation of the NHSE and its many-fermion analog on a universal quantum processor. To implement NHSE accumulation on a quantum computer, the time-evolution circuit not only needs to be non-reciprocal and non-unitary, but must also contain sufficiently many lattice qubits. We demonstrate this by systematically post-selecting ancilla qubits, as demonstrated through two paradigmatic non-reciprocal models on noisy quantum processors, with clear signatures of asymmetric spatial propagation and many-body "Fermi skin" accumulation. To minimize errors fro

SUBMITTER: Shen R 

PROVIDER: S-EPMC11794467 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature