Quantum simulation of collective proton tunneling in hexagonal ice crystals.
Quantum simulation of collective proton tunneling in hexagonal ice crystals.
复制标题
DOI：
10.1103/physrevlett.112.148302
复制
发表时间：
2014-04
影响因子：
8.6
通讯作者：
C. Drechsel-Grau;D. Marx
中科院分区：
文献类型：
--
作者：
C. Drechsel-Grau;D. Marx
通过量子模拟研究了质子隧穿对六方冰中多体相关质子转移的影响。经典的单粒子沿着单个氢键跳跃会在高温下导致电荷缺陷，而环状拓扑结构中的六个质子可以在低温下通过集体隧道作为离域准粒子协同移动，从而防止产生高能拓扑缺陷。我们的发现合理化了氢键网络中的多体量子隧穿现象，并表明这种现象可能比以前认为的更为普遍。
The effect of proton tunneling on many-body correlated proton transfer in hexagonal ice is investigated by quantum simulation. Classical single-particle hopping along individual hydrogen bonds leads to charge defects at high temperature, whereas six protons in ringlike topologies can move concertedly as a delocalized quasiparticle via collective tunneling at low temperature, thus preventing the creation of high-energy topological defects. Our findings rationalize many-body quantum tunneling in hydrogen-bonded networks and suggest that this phenomenon might be more widespread than previously thought.