Work

Universal entanglement embezzlement and divergent nonlocal magic from generic local chaotic quantum evolution

Year: 2026

Type: preprint

Abstract: We show that, starting from a product state, local unitary quantum evolutions generate intermediate states which exhibit a multiscale entanglement-spectrum structure required for universal entanglement embezzlement. This facilitates entanglement extraction from a catalyst many-body state while leaving it asymptotically unchanged. Remarkably, these atypical structures emerge generically at intermediate stages, well before reaching maximum entropy where thermalization has flattened out the spectral hierarchy. The resulting state is accompanied by nonlocal nonstabilizerness that diverges with the system size, consistent with a recently established equivalence between universal embezzlement and divergent nonlocal magic. Thus, without any fine tuning, a chaotic quantum evolution generates intermediate states which form a universal family of catalytic reservoirs.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2609.18691

Authors: Karjula, Matias, Ojanen, Teemu, Pöyhönen, Kim, Ala-Nissila, Tapio, Ivaki, Moein N.

Institutions: Aalto University, Tampere University, Helsinki Institute of Physics, University of Tampere

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, HORIZON EUROPE Framework Programme, HORIZON EUROPE European Innovation Council

Awards: Twinning to develop ELTE's research and innovation capacity in quantum reservoir computing, G4229847087, G493960214, Quantum reservoir computing for efficient signal processing, G7609458746, G8914310889

OpenAlex ID: W7213523876

Cites: 15

Cited by: 3

Related to: 10