Fast generation of Schrödinger cat states using a Kerr-tunable superconducting resonator
Artikel i vetenskaplig tidskrift, 2023

Schrödinger cat states, quantum superpositions of macroscopically distinct classical states, are an important resource for quantum communication, quantum metrology and quantum computation. Especially, cat states in a phase space protected against phase-flip errors can be used as a logical qubit. However, cat states, normally generated in three-dimensional cavities and/or strong multi-photon drives, are facing the challenges of scalability and controllability. Here, we present a strategy to generate and preserve cat states in a coplanar superconducting circuit by the fast modulation of Kerr nonlinearity. At the Kerr-free work point, our cat states are passively preserved due to the vanishing Kerr effect. We are able to prepare a 2-component cat state in our chip-based device with a fidelity reaching 89.1% under a 96 ns gate time. Our scheme shows an excellent route to constructing a chip-based bosonic quantum processor.

Författare

X. L. He

Chinese Academy of Sciences

Yong Lu

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Universität Stuttgart

D. Q. Bao

Chinese Academy of Sciences

Hang Xue

Chinese Academy of Sciences

W. B. Jiang

Chinese Academy of Sciences

Z. Wang

Chinese Academy of Sciences

Anita Fadavi Roudsari

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

J. S. Tsai

Tokyo University of Science

RIKEN

Z. R. Lin

Chinese Academy of Sciences

Nature Communications

2041-1723 (ISSN) 20411723 (eISSN)

Vol. 14 1 6358

Kvantljud: Generering och kontroll av fononer på kvantnivå

Vetenskapsrådet (VR) (2015-00152), 2016-01-01 -- 2025-12-31.

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1038/s41467-023-42057-0

PubMed

37821443

Mer information

Senast uppdaterat

2023-10-27