October 20, 2025
Nobel Prize Lecture with Prof. Alexey Ustinov
Prof. Alexey Ustinov from Karlsruhe Institute of Technology (KIT) deliver an exclusive lecture titled “Nobel Prize 2025: Quantum Circuits.”The event was held online on October 20, 2025. Prof. Ustinov provided a detailed analysis of the pioneering research by John Clarke, Michel Devoret, and John Martinis, whose work on superconducting quantum circuits earned them the 2025 Nobel Prize in Physics.
October 14, 2025
Ruixia Wang and collaborators’ paper on Suppressing Spurious Transitions was published in PRL!
Our new paper “Suppressing Spurious Transitions Using Spectrally Balanced Pulse” was published on PRL. Achieving precise control over quantum systems presents a significant challenge, especially in many-body setups, where residual couplings and unintended transitions undermine the accuracy of quantum operations. In superconducting qubits, parasitic interactions—both between distant qubits and with spurious two-level systems—can severely limit the performance of quantum gates.We introduce a pulse-shaping technique that uses spectrally balanced microwave pulses to suppress undesired transitions. Our method provides a simple yet powerful solution for mitigating adverse effects from parasitic couplings, enhancing quantum gate fidelity.
October 13, 2025
Prof. Yasunobu Nakamura Lab Tour
Prof. Yasunobu Nakamura from The University of Tokyo and RIKEN visited our research team. During the visit, he toured JinYu laboratory and engaged in in-depth discussions with team members on recent works. The exchange provided valuable perspectives for us.
September 23, 2025
It’s Here! Our New Lab’s First Dilution Refrigerator.
Our lab’s first dilution refrigerator has arrived and is now installed! A special thanks to He Wang, Yang Liu, Zhenxing Liu, Zhen Yang for their invaluable work in getting this key system up and running. Everything is off to a great start!
August 15, 2025
Our paper about Arbitrary Two-qubit Gates was published in Nature Physics!
We experimentally demonstrate a unified and versatile gate scheme capable of generating arbitrary two-qubit gates using only an exchange interaction and qubit driving on a superconducting quantum processor. We achieve high fidelities averaging 99.38% across a wide range of commonly used two-qubit unitaries, enabling precise multipartite entangled state preparation. Furthermore, we successfully produce a B gate, which efficiently synthesizes the entire family of two-qubit gates. Our results establish that fully exploiting the capabilities of the exchange interaction can yield a comprehensive and highly accurate gate set. With maximum expressivity, optimal gate time, demonstrated high fidelity and easy adaption to other quantum platforms, our unified control scheme offers the prospect of improved performance in quantum hardware and algorithm development.