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Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/154140

Title:	Random Quantum Ising Model with Three-Spin Couplings
Authors:	林瑜琤 Lin, Yu-Cheng;Iglói, Ferenc
Contributors:	應物所
Keywords:	disordered systems;critical phenomena;renormalization group;infinite disorder fixed point
Date:	2024-08
Issue Date:	2024-10-28 13:15:34 (UTC+8)
Abstract:	We apply a real-space block renormalization group approach to study the critical properties of the random transverse-field Ising spin chain with multispin interactions. First, we recover the known properties of the traditional model with two-spin interactions by applying the renormalization approach for the arbitrary size of the block. For the model with three-spin couplings, we calculate the critical point and demonstrate that the phase transition is controlled by an infinite disorder fixed point. We have determined the typical correlation-length critical exponent, which seems to be different from that of the random transverse Ising chain with nearest-neighbor couplings. Thus, this model represents a new infinite disorder universality class.
Relation:	Entropy, Special Issue: Violations of Hyperscaling in Phase Transitions and Critical Phenomena—in Memory of Prof. Ralph Kenna), Vol.26, No.8, 709 (12 pages)
Data Type:	article
DOI 連結:	https://doi.org/10.3390/e26080709
DOI:	10.3390/e26080709
Appears in Collections:	[應用物理研究所 ] 期刊論文

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