Physics undergraduate at Xiamen University Malaysia and Chinese-language poet. Quantum foundations, mathematical physics, and poems.https://hhungxun.my/enhttps://hhungxun.my/blog/anisotropic-kernels-frame-bundle-zh/https://hhungxun.my/blog/anisotropic-kernels-frame-bundle-zh/朋友問我，一顆球形棒棒糖能不能只靠舔變成地球。最佳策略其實只有一行；而我在找到它之前，罰錯了一個星期。Sat, 12 Sep 2026 00:00:00 GMT微分幾何球面曲率幾何控制https://hhungxun.my/blog/gershgorin-cassini-weyl-matrix/https://hhungxun.my/blog/gershgorin-cassini-weyl-matrix/Why pairwise eigenvalue localisation is a useful next step for structured matrices in general relativity.Wed, 09 Sep 2026 00:00:00 GMTspectral theorystructured matricesresearch noteshttps://hhungxun.my/blog/lad-ll-singular-limit/https://hhungxun.my/blog/lad-ll-singular-limit/An exact Gaussian benchmark separates a singular classical approximation from the onset of quantum radiation reaction.Wed, 09 Sep 2026 00:00:00 GMTsingular perturbationselectrodynamicsnumerical validationhttps://hhungxun.my/blog/anisotropic-kernels-frame-bundle/https://hhungxun.my/blog/anisotropic-kernels-frame-bundle/A friend asked whether you could lick a round lollipop into the shape of the Earth. The optimal strategy turns out to be one line long, and getting there cost me a week of minimising the wrong thing.Tue, 08 Sep 2026 00:00:00 GMTdifferential geometryholonomygeometric controlhttps://hhungxun.my/blog/gaussian-control-gravity-entanglement/https://hhungxun.my/blog/gaussian-control-gravity-entanglement/A Gaussian calculation separates mathematical existence, physical attribution, and experimental feasibility.Mon, 07 Sep 2026 00:00:00 GMTGaussian statessymplectic dynamicsquantum informationhttps://hhungxun.my/blog/real-quantum-theory-composition-rule/https://hhungxun.my/blog/real-quantum-theory-composition-rule/The modern real-versus-complex debate turns on how independently prepared systems combine.Sun, 06 Sep 2026 00:00:00 GMTquantum foundationsdivision algebrasreal quantum theoryhttps://hhungxun.my/blog/quantum-walk-spreading/https://hhungxun.my/blog/quantum-walk-spreading/Why unitary walks spread ballistically, how the coin controls symmetry, and what changes on a graph.Thu, 03 Sep 2026 00:00:00 GMTquantum walksquantum algorithmsspectral graph theoryhttps://hhungxun.my/poetry/2026-01-30-hamster/https://hhungxun.my/poetry/2026-01-30-hamster/星洲日報・文藝春秋Fri, 30 Jan 2026 00:00:00 GMT詩https://hhungxun.my/blog/so3-su2-angular-momentum/https://hhungxun.my/blog/so3-su2-angular-momentum/From noncommuting rotations and finite ladders to spherical harmonics, spin, and the hydrogen spectrum.Sun, 11 Jan 2026 00:00:00 GMTangular momentumLie algebrasrepresentation theoryhttps://hhungxun.my/blog/weyl-wigner-moyal-classical-limit/https://hhungxun.my/blog/weyl-wigner-moyal-classical-limit/The Weyl–Wigner dictionary, why multiplication becomes a star product, and what coarse-graining really does to the classical limit.Sun, 04 Jan 2026 00:00:00 GMTphase spacedeformation quantizationsemiclassical analysishttps://hhungxun.my/poetry/2024-07-05-crush-111/https://hhungxun.my/poetry/2024-07-05-crush-111/星洲日報・文藝春秋Fri, 05 Jul 2024 00:00:00 GMT詩https://hhungxun.my/poetry/2024-03-15-graduation-absent/https://hhungxun.my/poetry/2024-03-15-graduation-absent/星洲日報・文藝春秋Fri, 15 Mar 2024 00:00:00 GMT詩https://hhungxun.my/poetry/2024-01-12-beyond-the-nose/https://hhungxun.my/poetry/2024-01-12-beyond-the-nose/星洲日報・文藝春秋Fri, 12 Jan 2024 00:00:00 GMT詩https://hhungxun.my/poetry/2023-11-24-wishing/https://hhungxun.my/poetry/2023-11-24-wishing/星洲日報・文藝春秋Fri, 24 Nov 2023 00:00:00 GMT詩https://hhungxun.my/poetry/2023-09-19-bound-to-miss-you/https://hhungxun.my/poetry/2023-09-19-bound-to-miss-you/星洲日報・文藝春秋Tue, 19 Sep 2023 00:00:00 GMT詩https://hhungxun.my/poetry/2023-06-30-full-marks-essay/https://hhungxun.my/poetry/2023-06-30-full-marks-essay/星洲日報・文藝春秋Fri, 30 Jun 2023 00:00:00 GMT詩https://hhungxun.my/poetry/2023-06-30-new-village/https://hhungxun.my/poetry/2023-06-30-new-village/星洲日報・文藝春秋Fri, 30 Jun 2023 00:00:00 GMT詩https://hhungxun.my/poetry/2023-06-30-school-boys-toilet/https://hhungxun.my/poetry/2023-06-30-school-boys-toilet/星洲日報・文藝春秋Fri, 30 Jun 2023 00:00:00 GMT詩https://hhungxun.my/poetry/2023-04-14-history-textbook/https://hhungxun.my/poetry/2023-04-14-history-textbook/星洲日報・文藝春秋Fri, 14 Apr 2023 00:00:00 GMT詩https://hhungxun.my/poetry/2023-02-17-eden/https://hhungxun.my/poetry/2023-02-17-eden/星洲日報・文藝春秋Fri, 17 Feb 2023 00:00:00 GMT詩