Meet Willow, Google's Latest Breakthrough in Quantum Chip
2024.12.18 · Blog
The Willow chip is Google's latest breakthrough in quantum computing technology, designed to address one of the most significant challenges in the field: quantum error correction (QEC).
Quantum error correction is critical for scaling quantum computers to solve complex, real-world problems, as qubits—quantum computer's basic units—are highly sensitive to noise and errors. Willow improves the stability and reliability of quantum computations by implementing an exponential error correction method, which helps to mitigate these errors and enhance the overall performance of quantum algorithms.
3 Major Achievements of Willow Chip: A Brief Summary
1.Exponential Quantum Error Correction: Willow Achieves "Below Threshold"
According to Google's researchers, Willow's ability to handle complex quantum error correction codes has made it an invaluable tool for advancing quantum algorithm development.
Quantum error correction has long been a challenge in quantum computing. As the number of qubits increases, so do errors, often turning the system classical.
However, Google's Willow chip has achieved a significant breakthrough: as more qubits are added, the error rate decreases exponentially, making the system more quantum. Willow reached the milestone of being "below threshold"—reducing errors while scaling qubits—a major step in error correction since Peter Shor's 1995 introduction of the concept.
Willow also marks several scientific firsts, including real-time error correction on a superconducting quantum system, and a "beyond breakeven" demonstration, where the qubit arrays have longer lifetimes than individual qubits. This achievement confirms that error correction is improving the overall system.
As the first system to demonstrate "below threshold," Willow is a strong prototype for scalable logical qubits, bringing us closer to large, practical quantum computers capable of solving problems beyond the reach of classical systems.
2.Speed: Benchmark computation done in 5 minutes
Google used the random circuit sampling (RCS) benchmark, the hardest task for classical computers to replicate. It is a key test to determine if a quantum computer can outperform classical systems.
Willow's results on this benchmark are groundbreaking: it completed a computation in under five minutes that would take 10 septillion years on today's fastest supercomputers—far exceeding the known timescales in physics and the universe's age.
3.Performance: Setting New Standards in Quantum Computing
Willow outperforms previous quantum chips by improving error tolerance and computational fidelity, making it one of the most powerful quantum processors ever built.
Willow was developed at Google's advanced fabrication facility in Santa Barbara, where precise system engineering ensures all components, like qubit gates and readouts, work seamlessly together.
The chip has 105 qubits and leads in two major benchmarks: quantum error correction and random circuit sampling. Willow also shows a ~5x improvement in T1 times, with qubits retaining quantum states for nearly 100 microseconds, positioning it as a top performer in quantum hardware.
Its computational capacity is also linked to its power efficiency. Willow operates with a level of energy efficiency that is unmatched by previous quantum chips, making it a scalable solution for real-world applications in diverse sectors such as healthcare, finance, and materials science.
SpinQ's Industrial Edge: Scaling Chips Production and Practical Applications
SpinQ is a comprehensive provider of quantum computing solutions, dedicated to industrializing quantum technology and making it accessible to various industries. We develop and produce quantum chips, educational-grade nuclear magnetic quantum computers, industrial-grade superconducting quantum computers, quantum computing cloud platforms, and quantum application software.
SpinQ's superconducting quantum chip technology demonstrates a significant leap toward practical, large-scale applications. Unlike chips confined to experimental research, SpinQ's standardized and scalable superconducting quantum chips meet industrial-grade requirements.
This capability is exemplified in its collaboration with the UAE's Technology Innovation Institute, where SpinQ provided tailored quantum chips with precise parameter calibration. The partnership highlights SpinQ's commitment to delivering cost-effective, high-quality quantum chips at scale.
This achievement injects fresh momentum into the global cooperation of the quantum computing industry, showcasing SpinQ's role in driving quantum industrial innovation.
SpinQ Superconducting QPU
With years of experience in quantum research and manufacturing, we are undertaking a comprehensive upgrade to our quantum chip - SpinQ Superconducting QPU, aiming to push the boundaries of performance, stability, and scalability.
Our goal is to ensure that our quantum chips are not only on par with the best in the field but also pave the way for practical, large-scale quantum computing solutions.
The SpinQ superconducting quantum chip adopts a 1D or 2D chain topology design and operates in a 20 mK temperature environment.
It features high Qi values, long qubit lifetimes, and high stability, which means quantum bits can maintain their quantum states for longer periods, enabling more computational operations and improving the reliability and accuracy of quantum computing.
Additionally, with a dedicated quantum chip production line independently built and invested in by SpinQ, the company can fully control product quality and manufacturing processes, reducing the risk of cross-contamination and ensuring better product quality and stability.
SpinQ QPU Specification
Advantages of SpinQ Superconducting QPU
· Standardized & Mass-produced: Through standardized QPU design simulation, fabrication, packaging, and testing processes, SPINQ has achieved the capability to produce commercially available high-performance QPUs with decoherence time (T1) of up to 100 μs or more.
· Robust Performance & Fully Controllable Qubits: Users can achieve high-precision control over each qubit through independent control lines. When combined with SPINQ's QCM system, this setup enables high-fidelity quantum logic gate operations on SPINQ QPUs. Specifically, the fidelity of single-qubit gates can reach up to 99.9% or higher; two-qubit gate fidelity can reach up to 99% or higher.
· Flexible Options for Diverse Applications: SpinQ's QPU products are available in various configurations with different numbers of qubits, catering to diverse application scenarios and budget requirements.
· Stable and Reliable, Highly Integrated, Easy to Use: SPINQ's QPUs are fully packaged for straightforward installation and use in any experimental environment, eliminating the need for additional handling. They offer high flexibility and excellent thermal contact performance, ensuring stability and reliability.
· Factory Testing Report Included: Each QPU product comes with a standard factory characterization report that includes measurements such as resonant cavity frequency, qubit frequency, decoherence time, and more, ensuring the product's reliability.
· Professional 1-on-1 Services: We provide a variety of professional services for our QPU products, including customization, foundry services, design services, system solution tailoring, professional installation, and training, as well as technical support.
A Quantum Leap Forward
Google's Willow quantum chip marks a significant milestone in quantum computing. At SpinQ, we commend this achievement and remain dedicated to advancing our own quantum chip development. SpinQ is committed to leading the way in the quantum computing revolution with a focus on innovation and continuous improvement.