Serwatka Tobias, Roy Pierre-Nicholas
Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
J Chem Phys. 2024 Mar 14;160(10). doi: 10.1063/5.0195453.
In this work, we perform a density matrix renormalization group study of chains of planar rotors interacting via dipolar interactions. By exploring the ground state from weakly to strongly interacting rotors, we find the occurrence of a quantum phase transition between a disordered and a dipole-ordered quantum state. We show that the nature of the ordered state changes from ferroelectric to antiferroelectric when the relative orientation of the rotor planes varies and that this change requires no modification of the overall symmetry. The observed quantum phase transitions are characterized by critical exponents and central charges, which reveal different universality classes ranging from that of the (1 + 1)D Ising model to the 2D classical XY model.
在这项工作中，我们对通过偶极相互作用的平面转子链进行了密度矩阵重整化群研究。通过从弱相互作用转子到强相互作用转子探索基态，我们发现了无序量子态和偶极有序量子态之间量子相变的发生。我们表明，当转子平面的相对取向变化时，有序态的性质从铁电转变为反铁电，并且这种变化不需要改变整体对称性。观察到的量子相变由临界指数和中心荷表征，它们揭示了从(1 + 1)D伊辛模型到2D经典XY模型的不同普适类。
