May 18, 2024

New Silicon Carbide Qubits Bring Us One Step Closer to Quantum Networks

Chromium atoms implanted into silicon carbide serve as spin qubits. Oscillation in light emission from these atoms is a quantum residential or commercial property (bottom right).
The Impact
Scientists are exploring chromium problems in silicon carbide as potential spin qubits. One benefit of these spin qubits is that they give off light at wavelengths that are compatible with telecommunications optical fibers. Problems with the quality of products have actually limited these spin qubits viability.
Summary
A growing variety of attempts to commercialize quantum computers and quantum sensing units have actually invested greatly in particular types of qubits. Scientists must overcome a number of difficulties to realize practical quantum computing, communication, and sensing. For one, they need an improved understanding of the basic limits of various types of qubits. Spin qubits are particularly intriguing due to the fact that the electronic spin can save details for a long period of time compared with many other types of qubits. Furthermore, these qubits can be operated at space temperature, and they can be controlled and read using optics. Optical interfaces will be crucial for the advancement of this innovation because the photons can bring quantum info cross countries using existing telecoms fiber networks.
The research reported here revealed that chromium ions implanted in commercially offered silicon carbide substrates, and then annealed at high temperature, produced single spin problems that can be utilized for spin qubits. The same technique might be utilized to produce vanadium or molybdenum flaws as researchers continue the look for the ideal qubit.
Reference: “Coherent control and high-fidelity readout of chromium ions in business silicon carbide” by Berk Diler, Samuel J. Whiteley, Christopher P. Anderson, Gary Wolfowicz, Marie E. Wesson, Edward S. Bielejec, F. Joseph Heremans and David D. Awschalom, 29 January 2020, npj Quantum Information.DOI: 10.1038/ s41534-020-0247-7.
This task was supported by the Department of Energy (DOE) Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. This work was carried out, in part, at the Center for Integrated Nanotechnologies, a DOE Office of Science User Facility.

Researchers are checking out chromium flaws in silicon carbide as potential spin qubits. A growing number of attempts to commercialize quantum computers and quantum sensing units have invested heavily in specific types of qubits. Spin qubits are especially fascinating since the electronic spin can save info for a long time compared with many other types of qubits.

By U.S. Department of Energy
January 16, 2022

Chromium problems in silicon carbide may offer a brand-new platform for quantum information.
Quantum computers may be able to resolve science problems that are impossible for todays fastest traditional supercomputers. Quantum sensors may be able to measure signals that can not be determined by todays most delicate sensing units. Quantum bits (qubits) are the foundation for these gadgets. Researchers are examining numerous quantum systems for quantum computing and noticing applications. One system, spin qubits, is based upon the control of the orientation of an electrons spin at the websites of defects in the semiconductor products that make up qubits. Flaws can consist of percentages of products that are various from the main material a semiconductor is made of. Researchers just recently showed how to make high quality spin qubits based on chromium flaws in silicon carbide.

One system, spin qubits, is based on the control of the orientation of an electrons spin at the sites of problems in the semiconductor products that make up qubits. Scientists recently showed how to make high quality spin qubits based on chromium defects in silicon carbide.