非均匀Dzyaloshinskill-Moriya相互作用对量子Ising链热传导行为的影响

Effect of the Non-Uniform Dzyaloshinskii-Moriya Interaction on Heat Conduction of Quantum Ising Chains

基于Lindblad量子主方程方法,主要研究了交错、无序以及准周期Dzyaloshinskill-Moriya(DM)相互作用对量子Ising自旋链热传导行为的影响.通过计算局域能量密度和局域能流,发现对于这三类DM相互作用,当系统尺寸固定时,增大DM相互作用强度,流经量子Ising链的能流都将增多,但是能流随系统尺寸增大的标度行为却截然不同.因此,可以通过调节DM相互作用的强度与形式来控制量子Ising链的热传导行为.

Basing on the Lindblad master equation, we study the effect of the staggered, random, and the aperiodic Dzyaloshinski i-Moriya（ DM） on the heat conductivity of quantum Ising chains. By calculating the average energy-density profi le and the average energy current , the numerical results show that the DM interaction could increase the heat conduc-tion of Ising chains for the fixed system size with the three kinds of DM interactions above. But the scaling behaviors of energy current with increasing system size for the Ising chain with staggered,random,Finonacci DM interactions show di f-ferently. Therefore, the heat transport behavior of Ising chain could be adjusted by control l ing the strength and the forms of the DM interaction.