Gate Teleportation vs Circuit Cutting in Distributed Quantum Computing
Advanced Quantum Technologies 9, no. 9 (2026): e70424 Distributed quantum computing offers a path to scaling beyond the limits of individual quantum processors by connecting multiple quantum modules. In this work, researchers from memQ and Argonne National Laboratory compare 2 approaches to distributed computation: circuit cutting and entanglement-based gate teleportation. The study identifies the hardware performance regimes in […]
Erbium quantum memory platform with long optical coherence via back-end-of-line deposition on foundry-fabricated photonics
Phys. Rev. Applied 24, 054037 Realizing scalable quantum interconnects necessitates the integration of solid-state quantum memories with foundry photonics processes. While prior photonic integration efforts have relied upon specialized, laboratory-scale fabrication techniques, this work demonstrates the monolithic integration of a quantum memory platform with low-loss foundry photonic circuits via back-end-of-line deposition. We deposited thin films of […]
Monolithically Integrated C-Band Quantum Emitters on Foundry Silicon Photonics
Nano Letters, 2025 Solid-state spin-based quantum systems have emerged as popular platforms for quantum networking applications due to their optical interfaces, their long-lived quantum memories, and their natural compatibility with semiconductor manufacturing. Photonic crystal cavities are often used to enhance radiative emission; however, fabrication of the necessary subwavelength cavities is typically limited to small batch […]
Optical and microstructural studies of erbium-doped TiO2 thin films on silicon, SrTiO3, and sapphire.
J. Appl. Phys. 136, 124402 (2024) Rare-earth ion doped oxide thin films integrated on silicon substrates provide a route toward scalable, chip-scale platforms for quantum coherent devices. Erbium-doped is an attractive candidate: the optical transition is compatible with C-band optical fiber communications, while is an insulating dielectric compatible with silicon process technology. Through structural and optical studies of Er-doped thin […]
Isolation of individual Er quantum emitters in anatase TiO2 on Si photonics.
Appl. Phys. Lett. 125, 084001 (2024) Defects and dopant atoms in solid state materials are a promising platform for realizing single photon sources and quantum memories, which are the basic building blocks of quantum repeaters needed for long distance quantum networks. In particular, trivalent erbium (Er3+) is of interest because it couples C-band telecom optical transitions […]
A perspective on the pathway to a scalable quantum internet using rare-earth ions.
Appl. Phys. Rev. 10, 031307 (2023) The ultimate realization of a global quantum internet will require advances in scalable technologies capable of generating, storing, and manipulating quantum information. The essential devices that will perform these tasks in a quantum network are quantum repeaters, which will enable the long-range distribution of entanglement between distant network nodes. In […]