An efficient algorithm for translationally invariant finite-size periodic lattice systems in one spatial dimension

An efficient algorithm for translationally invariant finite-size periodic lattice systems in one spatial dimension
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一种用于一维有限尺寸周期晶格系统的平移不变的有效算法

DOI:
10.1088/1751-8113/42/27/272002
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发表时间:
2009-06
影响因子:
2.1
通讯作者:
Shi, Qian-Qian
Shi, Qian-Qian
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhou, Huan-Qiang;Shi, Qian-Qian

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我们提出了一种有效的算法来求一维平移不变有限大小周期格子系统基态波函数的矩阵积态表示。这是基于这样的观察,即每个位置的基态能量的有效计算只需要保留矩阵乘积状态的转移矩阵的一定数量的最大本征值,而不会牺牲任何精度。计算代价与系统的大小无关,并且以χ3为尺度,以χ为截断维度。对横场中的临界量子伊辛模型在有限大小的晶格上进行了测试,截断维度为200的晶格的大小为4800。
We develop an efficient algorithm to find a matrix product state representation of the ground-state wavefunctions for translationally invariant finite-size periodic lattice systems in one spatial dimension. This is based on the observation that the efficient computation of the ground-state energy per site only needs to retain a certain number of the largest eigenvalues of the transfer matrix for a matrix product state, without any sacrifice of accuracy. The computational cost is independent of the system's size, and scales as χ3 with χ being the truncation dimension. The algorithm is tested for the critical quantum Ising model in a transverse field on a finite-size lattice, with the size as large as 4800 for the truncation dimension 200.
DOI: 10.5555/2011572.2011576
发表时间: 2003-04
期刊: Quantum Inf. Comput.
影响因子: --
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通讯作者: J. Latorre;E. Rico;G. Vidal
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发表时间: 2008-08-29
影响因子: 8.6
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发表时间: 2005-11
期刊: Physical Review A
影响因子: 2.9
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发表时间: 2004-11-26
影响因子: 8.6
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DOI: 10.1088/1742-5468/2004/06/p06002
发表时间: 2004-06-01
影响因子: 2.4
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