Scientists have discovered that the tiny, atomic‑scale “shape” of a material can dramatically affect how fast quantum processes happen. By firing ultrafast laser pulses at two‑layered crystals—titanium diselenide (TiSe₂) and titanium ditelluride (TiTe₂)—researchers watched a key quantum transition take about 140 to 175 attoseconds (that’s 140‑175 × 10⁻¹⁸ seconds). In a very different material, copper telluride (CuTe), which forms long chain‑like structures, the same transition stretched beyond 200 attoseconds. The difference isn’t about the chemical composition alone; it’s about symmetry. Materials with high symmetry, like the neatly stacked layers of TiSe₂ and TiTe₂, let the quantum event zip along, while lower‑symmetry, more irregular structures like CuTe cause the process to lag. This finding tells physicists that to control quantum timing—crucial for future technologies such as quantum computers and ultra‑precise sensors—they must consider not just the atoms involved but also how those atoms are arranged. By tailoring material symmetry, researchers could fine‑tune the speed of quantum reactions, opening new pathways for faster, more reliable quantum devices.
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