Spin ladders and quantum simulators for Tomonaga–Luttinger liquids
Spin ladders and quantum simulators for Tomonaga–Luttinger liquids
复制标题
Tomonaga-Luttinger 液体的自旋梯和量子模拟器
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
T. Giamarchi
中科院分区：
文献类型：
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作者：
Simon Ward;P. Bouillot;H. Ryll;Klaus Kiefer;Karl Krämer;Ch. Rüegg;Ch. Rüegg;C. Kollath;T. Giamarchi
磁绝缘体已被证明可用作巡回相互作用量子系统的量子模拟器。特别是化合物（C5 H12 N）2CuBr 4（简称：（HPip）2CuBr 4）被证明是Tomonaga-Luttinger液体（TLL）的一个显著实现，并允许我们定量测试TLL理论。取代弱无序这类化合物，因此允许我们使用它们来解决有关TLL中的无序效应的问题，例如玻色玻璃的形成。在本文中，我们提出，作为在这个方向上的第一步，相关的（HPIP）2CuCl 4化合物的性质的研究。我们确定的交换耦合和计算的比热的温度和磁场的依赖性，使用有限的温度密度矩阵重整化群程序。与零磁场下测得的比热的比较证实了（HPip）2CuCl 4化合物的交换参数和哈密顿量，为开始研究无序效应提供了基础。
Magnetic insulators have proven to be usable as quantum simulators for itinerant interacting quantum systems. In particular the compound (C5H12N)2CuBr4 (for short: (Hpip)2CuBr4) was shown to be a remarkable realization of a Tomonaga–Luttinger liquid (TLL) and allowed us to quantitatively test the TLL theory. Substitution weakly disorders this class of compounds and thus allows us to use them to tackle questions pertaining to the effect of disorder in TLL as well, such as that of the formation of the Bose glass. In this paper we present, as a first step in this direction, a study of the properties of the related (Hpip)2CuCl4 compound. We determine the exchange couplings and compute the temperature and magnetic field dependence of the specific heat, using a finite temperature density matrix renormalization group procedure. Comparison with the measured specific heat at zero magnetic field confirms the exchange parameters and Hamiltonian for the (Hpip)2CuCl4 compound, giving the basis needed to begin studying the disorder effects.
影响因子：
8.6
作者：
Rueegg, Ch.;Kiefer, K.;Kraemer, K. W.
通讯作者：
Kraemer, K. W.