Quantum Computing News

Great Lakes Crystal Technologies GLCT strengthens the supply chain for quantum diamonds used in research and advanced devices.

The diamond, a gemstone valued for its perfect shine, has been associated for ages with luxury and timeless beauty. But in the quickly changing field of quantum information technology, a diamond’s worth lies in its imperfections rather than its perfection. The crucial building blocks of qubits required to power the upcoming generation of quantum sensors, computers, and networks are these deliberate flaws, sometimes referred to as “nitrogen-vacancy defects” or vacancy centers.

In the Midwest today, there is a strong regional drive to turn these tiny defects into a thriving industrial sector. One of the first integrated quantum diamonds supply chains in the US is being built by a varied ecosystem of startups, well-known international leaders, and academic institutions, with a focus on the Illinois-Wisconsin-Indiana region. Known as the “Quantum Prairie,” this project seeks to close the gap between mass-market manufacturing and laboratory innovations.

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Why Diamonds Are a Qubit’s Best Friend

Qubits are infamously brittle in the quantum world and are readily upset by their surroundings. Diamond-based qubits have a special benefit: durability, whereas many quantum devices need temperatures lower than space to operate.

The faulty qubits inside the diamond lattice, the hardest natural substance on Earth, are shielded by it. In addition to effectively dissipating heat, diamond’s electrically insulating qualities also filter out background noise. Diamond qubits are able to retain their quantum information at far greater temperatures and for longer periods of time than other systems due to their structural resilience.

Because of these properties, diamonds are especially useful for quantum sensing. These sensors can monitor magnetic fields with extreme precision, which has revolutionary uses in mining, navigation, and even medical diagnostics. For example, a diamond-based quantum sensor may track the movement of a medicine molecule through a single human cell by affixing a magnetic atom to the molecule.

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The “Ultimate Semiconductor” Challenge

Experts refer to diamond as the “ultimate semiconductor” outside of quantum applications. Diamond performs better than silicon in almost every technical criterion, including power efficiency, physical resistance, and dependability, yet silicon is still the foundation of modern electronics because it is inexpensive and plentiful.

However, quality and expense have historically been the two main obstacles that have impeded the introduction of diamonds. The process of creating diamonds with the exact vacancy centers needed for quantum technologies is costly and intricate. According to Paul Quayle, vice president of research and development at Great Lakes Crystal Technologies (GLCT), “the quality of the material just isn’t high enough to exploit it for the performance that you need.”

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A Collaborative Manufacturing Ecosystem

Five important corporate partners of the Chicago Quantum Exchange (CQE) are using their complementary strengths across the production lifecycle to address these bottlenecks:

• Great Lakes Crystal Technologies (GLCT) and WD Advanced Materials are the two businesses that focus on the initial stage of producing high-purity, quantum-grade diamonds. Diamond blocks with deliberate “pink” tints are created by WD Advanced Materials to indicate the presence of nitrogen-vacancy flaws that are employed as qubits.
• K1 Semiconductor: Utilizing a novel “spalling” technique, K1 Semiconductor is a startup based at the University of Chicago Pritzker School of Molecular Engineering (UChicago PME). This method significantly increases cost-effectiveness and scalability by splitting a single diamond substrate into ultra-thin layers up to 20 times.
• staC12: Another UChicago PME firm, staC12, is dedicated to creating and incorporating thin-film diamonds onto various materials, such as sapphire and silicon. This is important since “all of modern technology is made of material heterostructures,” and integrating diamond with other materials is a well-known challenge.
• Applied Materials: As a world leader in materials engineering, Applied Materials helps integrate diamond hearts into electronic devices that can interact through optical and electrical signals by providing the industrial infrastructure required to connect lab-scale research with mass production.

These players are already seeing results from their synergy. For instance, K1 Semiconductor and GLCT are testing a cycle in which GLCT grows diamond in bulk, K1 separates it into wafers, and then GLCT uses the templates to grow more diamond.

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The Bloch: Scaling to a National Level

The Bloch Quantum Tech Hub, a partnership headed by the CQE, is the focal point of this regional initiative. Recently designated as a US Tech Hub by the Economic Development Administration, The Bloch is competing for federal funding to establish a domestic quantum supply chain that can scale.

A key weakness in the U.S. quantum ecosystem, according to CQE director David Awschalom, is the absence of a large-scale domestic supply chain. The Bloch wants to make sure that the shift from laboratory physics to field-deployed sensors is not “throttled by material scarcity” by uniting inventors and producers into a single network.

The Future of the Quantum Prairie

As the technology advances, applications in quantum computing and communication are anticipated to follow, even as diamond-based quantum sensors are already getting close to commercialization. Diamond, according to John Ciraldo, CTO of WD Advanced Materials, will be the “second implementation” of quantum computing, the point at which quantum systems surpass the capabilities of existing technologies.

The Midwest is establishing itself as the center of this emerging sector with the Quantum Prairie partnership. Through their mastery of the “flaw,” these businesses are guaranteeing that the United States will continue to lead the quantum revolution.

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