Single-photon quantum computers are also coherent at room temperature; though their stability: "A physical [photonic] qubit with built-in error correction" (20

Single-photon quantum computers are also coherent at room temperature; though their stability: "A physical [photonic] qubit with built-in error correction" (2024) https://news.ycombinator.com/item?id=39243929 https://news.ycombinator.com/item?id=39243929 What about phononic quantum computing though, are phononic wave functions stable/coherent?