Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session H04: Quantum Computing with Light
8:00 AM–10:00 AM,
Wednesday, June 2, 2021
Chair: Olivier Pfister, U. Virginia
Abstract: H04.00001 : Programmable quantum gates in a continuous variable optical cluster state *
8:00 AM–8:30 AM
Live
Presenter:
Ulrik L Andersen
(Technical University of Denmark)
Author:
Ulrik L Andersen
(Technical University of Denmark)
scalable quantum information processing. It has in recent years witnessed an increasing interest due to the simplicity in generating the foundational states – the cluster states – deterministically and in a scalable manner (1,2). There are still numerous steps to be taken towards realizing universal quantum computation but one of the critical steps is the realization of single and two-mode gates.
In MBQC, quantum gates are implemented through simple Gaussian measurements of the cluster state: High-efficiency homodyne detection suffices to realize a complete gate set in the two-dimensional sub-space of the Gottesman-Kitaev-Preskill (GKP) qubits. GKP qubits are of particular interest as they allow for the implementation of non-Clifford gates via Gaussian transformation and they are error-correctable by Gaussian transformations (3).
Here we present the execution of a complete set of measurement-based Gaussian single- and two-mode gates in a large two-dimensional cluster state (4). The fully programmable gates are also combined into a small-scaled circuit, demonstrating the programmability and flexibility of the setup. These demonstrations are critical steps towards realizing a universal quantum processor based on continuous variables.
- Larsen et al, Science 366, 369 (2019)
Warit et al, Science 366, 373 (2019)
Larsen et al, arxiv:2101.03014
Larsen et al, arxiv:2010.14422
*DNRF142: Center for Macroscopic Quantum States (bigQ), DTU Physics, Denmark
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