High-fidelity qutrit entangling gates for superconducting circuits

Noah Goss (), Alexis Morvan, Brian Marinelli, Bradley K. Mitchell, Long B. Nguyen, Ravi K. Naik, Larry Chen, Christian Jünger, John Mark Kreikebaum, David I. Santiago, Joel J. Wallman and Irfan Siddiqi
Additional contact information
Noah Goss: University of California, Berkeley
Alexis Morvan: Computational Research Division, Lawrence Berkeley National Laboratory
Brian Marinelli: University of California, Berkeley
Bradley K. Mitchell: University of California, Berkeley
Long B. Nguyen: Computational Research Division, Lawrence Berkeley National Laboratory
Ravi K. Naik: University of California, Berkeley
Larry Chen: University of California, Berkeley
Christian Jünger: Computational Research Division, Lawrence Berkeley National Laboratory
John Mark Kreikebaum: University of California, Berkeley
David I. Santiago: Computational Research Division, Lawrence Berkeley National Laboratory
Joel J. Wallman: Keysight Technologies Canada
Irfan Siddiqi: University of California, Berkeley

Nature Communications, 2022, vol. 13, issue 1, 1-6

Abstract: Abstract Ternary quantum information processing in superconducting devices poses a promising alternative to its more popular binary counterpart through larger, more connected computational spaces and proposed advantages in quantum simulation and error correction. Although generally operated as qubits, transmons have readily addressable higher levels, making them natural candidates for operation as quantum three-level systems (qutrits). Recent works in transmon devices have realized high fidelity single qutrit operation. Nonetheless, effectively engineering a high-fidelity two-qutrit entanglement remains a central challenge for realizing qutrit processing in a transmon device. In this work, we apply the differential AC Stark shift to implement a flexible, microwave-activated, and dynamic cross-Kerr entanglement between two fixed-frequency transmon qutrits, expanding on work performed for the ZZ interaction with transmon qubits. We then use this interaction to engineer efficient, high-fidelity qutrit CZ† and CZ gates, with estimated process fidelities of 97.3(1)% and 95.2(3)% respectively, a significant step forward for operating qutrits on a multi-transmon device.

Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-022-34851-z Abstract (text/html)

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:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34851-z

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

DOI: 10.1038/s41467-022-34851-z

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

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