https://phys.org/news/2018-02-…state-enable-quantum.html
Science has discovered that polaritons act to entangle particles and they stay entangled after the polaritons get through with them. This entanglement includes light composed of photons that gain mass and stay together. This new type of light travels at very low speeds: 3 kilometers a second. Its may be possible in the future to get many photons to form a light crystals. Maybe polaritons can do the same quantum transformations with quarks and gluons. I wonder what will happen then.