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- Title
Random Quantum Ising Model with Three-Spin Couplings.
- Authors
Iglói, Ferenc; Lin, Yu-Cheng
- 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.
- Subjects
PHASE transitions; RENORMALIZATION group; ISING model; CRITICAL point (Thermodynamics); POINT set theory
- Publication
Entropy, 2024, Vol 26, Issue 8, p709
- ISSN
1099-4300
- Publication type
Article
- DOI
10.3390/e26080709