cattish [she/her]

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Joined 5 months ago
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Cake day: March 17th, 2026

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  • Mao ze Jong Un has murdered 67 gazillion people with his own hands during his cultural appropriation revolution. And yet you still support China just because they make cheap products and pulled millions out of poverty and have a very high rate of home ownership and have better healthcare and better public transport and a more representative political system and build infrastructure in many African countries and send aid to places like Cuba and…

    Czech maid, tankie.






  • It rendered for me, in my phone firefox.

    full text

    A Chinese research team has broken a long-standing bottleneck in superconducting quantum computing, managing to keep two-qubit gates fast without sacrificing accuracy.

    The team, jointly formed by Origin Quantum and the University of Science and Technology of China, proposed a scheme called the “parameter-space expansion controlled-Z (PSE-CZ) gate.” The work has been published in the international physics journal Physical Review Letters, with experiments carried out on China’s self-developed superconducting quantum computer “Origin Wukong.”

    Quantum gates are the basic operations behind any quantum computation. For reliable results, they must combine ultra-high speed with ultra-high fidelity. For years, there was a trade-off: faster gates worsen waveform distortion and timing errors, hurting precision, while slower operations drag down overall performance.

    To address this, the team tested the PSE-CZ scheme on 20 pairs of two-qubit gates using Origin Wukong. Results showed the approach suppresses errors caused by short-time distortion, pushing gate performance closer to the dephasing limit. Even at extremely short gate times of 30 to 40 nanoseconds, PSE-CZ outperformed conventional CZ gates.

    The scheme is not limited to superconducting systems. It could extend to other platforms such as ion traps and solid-state spin qubits, promising faster and higher-fidelity quantum logic operations.