Results 41 to 50 of about 32,713 (278)
Fully Frustrated Ising Model on a Square Lattice [PDF]
Progress of Theoretical Physics Supplement, 1986 We investigate a fully frustrated Ising model with four nearest-neighbor interaction constants on a square lattice. We obtain an exact form of the partition function by using a decimation transformation and a dual transformation. The partition function is then expressed as a product of two partition functions each of which is the one of the Ising model
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Triad second renormalization group
Journal of High Energy Physics, 2022 We propose a second renormalization group (SRG) in the triad representation of tensor networks. The SRG method improves two parts of the triad tensor renormalization group, which are the decomposition of intermediate tensors and the preparation of ...
Daisuke Kadoh +2 more
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Fundamental limits on low-temperature quantum thermometry with finite resolution [PDF]
Quantum, 2019 While the ability to measure low temperatures accurately in quantum systems is important in a wide range of experiments, the possibilities and the fundamental limits of quantum thermometry are not yet fully understood theoretically.
Patrick P. Potts +2 more
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The Extended Coupled Cluster Treatment of Correlations in Quantum Magnets [PDF]
, 1999 The spin-half XXZ model on the linear chain and the square lattice are examined with the extended coupled cluster method (ECCM) of quantum many-body theory.
A.W. Sandvik +46 more
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Entropy, 2018 The mixed spin-1/2 and spin-S Ising model on the Union Jack (centered square) lattice with four different three-spin (triplet) interactions and the uniaxial single-ion anisotropy is exactly solved by establishing a rigorous mapping equivalence with the ...
Jozef Strečka
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Finite-temperature phase transitions in the quantum fully frustrated Ising models
, 2012 The quantum antiferromagnetic spin-1/2 Ising model on a triangular lattice and analogous fully frustrated Ising model on a square lattice with quantum fluctuations induced by the application of the transverse magnetic field are studied at finite ...
S. V. Iordansky +4 more
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Free-Fermion Models and Two-Dimensional Ising Models Under Zero Field and Imaginary Field i(π/2)kBT
EntropyThe Ising model is famous in condensed matter and statistical physics. In this work we present a free-fermion formulation of the two-dimensional classical Ising models on honeycomb, triangular and Kagomé lattices. Each Ising model is studied in the cases
De-Zhang Li, Xin Wang, Xiao-Bao Yang
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Thermal Ising transition in two-dimensional SU(3) Fermi lattice gases with population imbalance
Physical Review Research, 2023 We focus on three-component SU(3) Fermi gases loaded into a square optical lattice, with population imbalance between one component and the others. At strong coupling the system is described by the SU(3) Heisenberg model with an external field that ...
Hayato Motegi +3 more
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The square lattice Ising model on the rectangle III: Hankel and Toeplitz determinants [PDF]
Journal of Physics A: Mathematical and Theoretical, 2021 Abstract Based on the results obtained in (Hucht 2017 J. Phys. A: Math. Theor. 50 065201), we show that the partition function of the anisotropic square lattice Ising model on the L × M rectangle, with open boundary conditions in both directions, is given by the determinant of an M/2 × M/2 Hankel matrix, that ...
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Physical Review Research, 2019 The nonequilibrium random-field Ising model is well studied, yet there are outstanding questions. In two dimensions, power-law scaling approaches fail and the critical disorder is difficult to pin down.
L. X. Hayden +2 more
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