Direct observation of liquid–liquid phase coexistence in deeply supercooled water using an accurate polarizable multipole model

Proceedings of the National Academy of Sciences, Volume 123, Issue 4, January 2026. <br/>SignificanceThe hypothesis of liquid–liquid phase separation in deeply supercooled water has captivated the physics and chemistry communities for decades, but experiments are hindered by spontaneous ice nucleation. Computational studies on supercooled …