Entangling Schrodinger's cat states by bridging discrete- and continuous-variable encoding.

ABSTRACT: In quantum information processing, two primary research directions have emerged: one based on discrete variables (DV) and the other on the structure of quantum states in a continuous-variable (CV) space. Integrating these two approaches could unlock new potentials, overcoming their respective limitations. Here, we show that such a DV-CV hybrid approach, applied to superconducting Kerr parametric oscillators (KPOs), enables us to entangle a pair of Schrödinger's cat states by two methods. The first involves the entanglement-preserving conversion between Bell states in the Fock-state basis (DV encoding) and those in the cat-state basis (CV encoding). The second method implements a iSWAP gate between two cat states following the procedure for Fock-state encoding. This simple and fast gate ope

SUBMITTER: Hoshi D 

PROVIDER: S-EPMC11791159 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature