What is IBM Quantum System Two and how is it scaled?

Transcript

We've heard so much about the GPU Chip's A.I. needs, which have catapulted in video to the top of the leaderboard. But what about quantum computing? How are they different? And who's making them? Jerry Chow of IBM gave us a tour at the Thomas J. Watson Center in Yorktown, New York. So this is our IBM Quantum System two, which is the most recent one... Read More

Key Insights

• The system uses a cryogenic infrastructure to cool qubits to 15 milli Kelvin.
• Nighthawk is the latest 120 qubit chip with higher connectivity than prior generations.
• Control electronics are placed near the cryogenic hardware to minimize latency.
• Wiring and cabling are minimized to allow more chips in the same footprint.
• Chips can be connected cryogenically using a network approach called Flamingo for scaling.
• Classical control networks enable real time decisions across chips during computations.
• The architecture supports modular expansion by adding more chips and associated infrastructure.
• Qualification and testing labs reproduce deployment conditions to validate devices before data center deployment.

Questions & Answers

Q: How does IBM System Two achieve modular scaling in a data center?

IBM System Two achieves modular scaling by using a modular architecture that allows a varying number of Nighthawk chips to be mounted on a common printed circuit board and integrated with a cryogenic refrigeration system. It also includes scalable control electronics that can be expanded to match the number of qubits, enabling growth in a data center without rearchitecting the core platform.

Q: What role does the cryogenic infrastructure play in System Two?

The cryogenic infrastructure is central to System Two, cooling the qubits to 15 milli Kelvin and providing a stable low temperature environment necessary for quantum operations. It includes a dilution refrigerator and a lower temperature stage connected to a pulse tube cooler, enabling the quantum processor chips to function with reduced thermal noise and improved coherence.

Q: What is the Nighthawk chip and how does it differ from previous processors?

The Nighthawk chip is a 120 qubit quantum processor with a square lattice layout, offering greater qubit connectivity than the earlier Herren processor. It is mounted on a printed circuit board and integrated into the cryogenic system, and its design supports multiple chips to be used together, enabling more complex quantum circuits and potential improvements in performance.

Q: How are multiple qubits connected in System Two to enable larger computations?

Multiple qubits are connected through a combination of crystallized wiring on the chip, integration on a shared circuit board, and potential cryogenic quantum links between chips, such as those demonstrated in Flamingo. This networked approach allows qubits on different chips to participate in the same computation, enabling larger and more complex quantum circuits.

Q: Why are control electronics placed close to the cryogenic hardware?

Control electronics are placed close to the cryogenic hardware to minimize latency and ensure fast, reliable signaling to manipulate and readout qubits. Proximity reduces the time delay in sending control pulses and collecting measurement results, which is crucial for coherent quantum operations and real time circuit decisions.

Q: What is Flamingo and how does it relate to System Two?

Flamingo refers to a quantum networking approach demonstrated earlier that enables cryogenic links between chips, allowing scalable interconnection of multiple quantum processors. In System Two, this concept supports module by module scaling, letting separate chips work together as a single larger quantum system while maintaining coherence and synchronized operation.

Q: What kind of testing happens in the lab before deployment to a data center?

The lab conducts room temperature and cryogenic tests to qualify and characterize each chip after fabrication. It simulates deployment conditions to verify performance, coherence, and reliability. This qualification helps determine whether a chip is suitable for inclusion in a data center deployment, ensuring the system meets required standards.

Q: How does IBM envision running a circuit across multiple chips in real time?

IBM envisions running a circuit across multiple chips by leveraging both the inter chip quantum links and the classical control networks that coordinate operations. The system can read qubits on one chip and immediately influence operations on another, enabling dynamic routing of computations and more flexible quantum programming across a modular platform.

Summary & Key Takeaways

• IBM Quantum System Two is a modular architecture designed for data centers and scalable growth.

• The setup includes cryogenic cooling, control electronics, and multiple qubits arranged on chips to form a larger system.

• The platform supports inter-chip connections and dynamic circuit capabilities to run a variety of quantum workloads.