5 papers
Correlations decide a shallow-circuit advantage
Zijian Gong, Zhaobin Lyu, Jingjing Hu +2
Quantum computers are claimed to produce samples ordinary classical computers cannot reproduce. The sharpest such claim known pits constant-depth quantum circuits, given one entang…
The wiring sets a phase-blind quantum memory's gap, the weight caps its coherence
Ruini Qian, Zhaobin Lyu, Zelong Yin +3
Engineered dissipation corrects errors, yet a memory's phase decays. What the memory's gap measures is not settled. Here we show that when each jump resets one basis state, the wir…
Engineering the Environment of a Superconducting Qubit with an Artificial Giant Atom
Jingjing Hu, Dengfeng Li, Yufan Qie +4
In quantum computing, precise control of system-environment coupling is essential for high-fidelity gates, measurements, and networking. We present an architecture that employs an…
Minimizing Kinetic Inductance in Tantalum-Based Superconducting Coplanar Waveguide Resonators for Alleviating Frequency Fluctuation Issues
Dengfeng Li, Jingjing Hu, Yuan Li +1
Advancements in the fabrication of superconducting quantum devices have highlighted tantalum as a promising material, owing to its low surface oxidation microwave loss at low tempe…
Optimizing Resonator Frequency Stability in Flip-Chip Architectures: A Novel Experimental Design Approach
Yuan Li, Tianhui Wang, Jingjing Hu +2
In multi-qubit superconducting systems utilizing flip-chip technology, achieving high accuracy in resonator frequencies is of paramount importance, particularly when multiple reson…