Ultra-high-density local structure in liquid water<xref rid="cpb_28_11_116104fn1" ref-type="fn">*</xref><fn id="cpb_28_11_116104fn1"><label>*</label><p>Project supported by the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-SYS003) and the National Natural Science Foundation of China (Grant Nos. 11574310 and 11774394).</p></fn>

Ultra-high-density local structure in liquid water**

Project supported by the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-SYS003) and the National Natural Science Foundation of China (Grant Nos. 11574310 and 11774394).

Yang Cheng^{1, 2, 3}, Zhang Chuanbiao⁴, Ye Fangfu^{1, 2, 5, †}, Zhou Xin^{2, ‡}

Transition matrix elements. Panels (a) and (b) show, respectively, the T_LH (the transition probability from L to H) and T_HL (the transition probability from H to L) at 1 atm and 300 K, given by the 4000-molecule simulations, where the open squares (circles) represent the HDL (LDL) molecules in the first shell of UHDL (HDL₁ and LDL₁) and the solid squares (circles) represent the non-first-shell HDL (LDL) molecules (HDL₂ and LDL₂).