Entanglement of bosonic modes through an engineered exchange interaction

Yvonne Y. Gao (), Brian J. Lester (), Kevin S. Chou, Luigi Frunzio, Michel H. Devoret, Liang Jiang, S. M. Girvin and Robert J. Schoelkopf ()
Additional contact information
Yvonne Y. Gao: Yale University
Brian J. Lester: Yale University
Kevin S. Chou: Yale University
Luigi Frunzio: Yale University
Michel H. Devoret: Yale University
Liang Jiang: Yale University
S. M. Girvin: Yale University
Robert J. Schoelkopf: Yale University

Nature, 2019, vol. 566, issue 7745, 509-512

Abstract: Abstract Quantum computation presents a powerful new paradigm for information processing. A robust universal quantum computer can be realized with any well controlled quantum system, but a successful platform will ultimately require the combination of highly coherent, error-correctable quantum elements with at least one entangling operation between them1,2. Quantum information stored in a continuous-variable system—for example, a harmonic oscillator—can take advantage of hardware-efficient quantum error correction protocols that encode information in the large available Hilbert space of each element3–5. However, such encoded states typically have no controllable direct couplings, making deterministic entangling operations between them particularly challenging. Here we develop an efficient implementation of the exponential-SWAP operation6 and present its experimental realization between bosonic qubits stored in two superconducting microwave cavities. This engineered operation is analogous to the exchange interaction between discrete spin systems, but acts within any encoded subspace of the continuous-variable modes. Based on a control rotation, the operation produces a coherent superposition of identity and SWAP operations between arbitrary states of two harmonic oscillator modes and can be used to enact a deterministic entangling gate within quantum error correction codes. These results provide a valuable building block for universal quantum computation using bosonic modes.

Date: 2019
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41586-019-0970-4 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:566:y:2019:i:7745:d:10.1038_s41586-019-0970-4

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/s41586-019-0970-4

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().