Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session S47: Superconducting Bosonic Qubits
8:00 AM–11:00 AM,
Thursday, March 7, 2024
Room: 200CD
Sponsoring
Unit:
DQI
Chair: Benjamin D'Anjou, Univ Ulm
Abstract: S47.00006 : Demonstrating an erasure-detected entangling gate between dual-rail cavity qubits - part 1
9:24 AM–9:36 AM
Presenter:
Anirudh Narla
(Quantum Circuits, Inc.)
Authors:
Anirudh Narla
(Quantum Circuits, Inc.)
Taewan Noh
(Quantum Circuits, Inc.)
Nitish Mehta
(Quantum Circuits, Inc.)
Tzu-Chiao Chien
(Quantum Circuits, Inc.)
Pinlei Lyu
(Quantum Circuits, Inc.)
James D Teoh
(Quantum Circuits, Inc.)
José Aumentado
(Quantum Circuits, Inc.)
S. Harvey Moseley
(Quantum Circuits, Inc.)
Robert J Schoelkopf
(Quantum Circuits, Inc.)
Collaboration:
Yale-QCI Collaboration
In part 1 of this talk, we focus on the remaining missing ingredient -- an entangling gate between two dual-rail cavity qubits. Following the proposal in [6], we show how entangling ZZ-gates can be implemented with just a beamsplitter operation between two of the four cavities, and an ancilla transmon that is dispersively coupled to only one of the cavities. We detail the gate operation and show how it can detect the dominant first-order errors in the cavities and transmon, and enables lower gate infidelities that scale as (T_gate/T_coherence)^2 when no errors are flagged.
[1] Teoh et al., PNAS 120 (41), e2221736120, 2023
[2] Chou et al., arXiv:2307.03169, 2023
[3] Lu, Maiti et al., Nat Comm 14, 5767, 2023
[4] Chapman, de Graaf et al., PRX Quantum 4, 020355, 2023
[5] Koottandavida, Tsioutsios et al. in prep.
[6] Tsunoda, Teoh et al., PRX Quantum 4, 020354, 2023
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