CEA-Leti and CEA-Inac pave the way for quantum information processing on SOI CMOS platform

CEA-Leti today announced preliminary steps for demonstrating a quantum bit, or qubit, the building block of quantum information, in a process utilizing a silicon-on-insulator (SOI) CMOS platform.

While the leading solid-state-based approach today for treating quantum information uses superconducting qubits, there are several potential alternatives. These include semiconductor spin qubits, historically demonstrated in III-V materials, but with limited “lifetime” due to coupling between the electron spin and the nuclear spins of the III-V elements.

Only in recent years has the prospect of using nuclear spin-free, isotopically purified silicon-28, the most-common isotope, made silicon an especially attractive candidate for hosting electron spin qubits with a long quantum coherence time. The main challenge now is defining an elementary cell compatible with circuit upscaling to hundreds of qubits and more.

Leti and its long-time research partner Inac, a fundamental research division of CEA, are investigating a silicon-on-insulator (SOI) technology for quantum computing with proven scalability, since it was originally developed for CMOS VLSI circuits. In this approach, quantum dots are created beneath the gates of n-type (respectively p-type) field effect transistors, which are designed to operate in the “few-electron” (respectively “few-hole”) regime at cryogenic temperatures (below 0.1 K).

Leti and Inac have developed a process for mastering control of the operation of both types of devices using Leti’s SOI nanowire FET technology. Their teams have demonstrated the co-integration and successful operation of quantum objects with conventional CMOS control electronics (standard ring oscillators) on 300mm SOI substrates.

“This technology has acquired a certain degree of robustness, and we aim at using it with very minor modifications to demonstrate qubits co-integrated with their control electronics,” said Louis Hutin, scientific staff. “This co-integration success represents a critical asset for the eventual design of a quantum computer.”


Easily post a comment below using your Linkedin, Twitter, Google or Facebook account. Comments won't automatically be posted to your social media accounts unless you select to share.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>



Low-outgassing Faraday Isolators to improve lifetime and reliability of optical systems
02/18/2016Qioptiq, an Excelitas Technologies company introduces the LINOS Low-outgassing Faraday Isolators, the first of th...
Versatile high throughput SEM from JEOL
11/04/2015JEOL's new JSM-IT100 is the latest addition to its InTouchScope Series of Scanning Electron Microscopes....
Entegris expands CMP filtration technology solutions and research, analytical and manufacturing capabilities
09/04/2015The Entegris filter platform using NMB media now includes the Planargard bulk, Solaris point...