Results 51 to 60 of about 56,836 (316)

Weak Singularities of the Isothermal Entropy Change as the Smoking Gun Evidence of Phase Transitions of Mixed-Spin Ising Model on a Decorated Square Lattice in Transverse Field

Entropy, 2021
The magnetocaloric response of the mixed spin-1/2 and spin-S (S>1/2) Ising model on a decorated square lattice is thoroughly examined in presence of the transverse magnetic field within the generalized decoration-iteration transformation, which provides ...
Jozef Strečka, Katarína Karl’ová
doaj   +1 more source

Critical temperatures of the Ising model on Sierpiñski fractal lattices [PDF]

EPJ Web of Conferences, 2020
We report our latest results of the spectra and critical temperatures of the partition function of the Ising model on deterministic Sierpiñski carpets in a wide range of fractal dimensions. Several examples of spectra are given.
Perreau Michel
doaj   +1 more source

Shaping lattice through irrelevant perturbation: Ising model

Journal of High Energy Physics, 2019
The leading irrelevant perturbation, which controls the deviation of critical square lattice Ising model with periodic boundary conditions from its continuous CFT analog is identified.
Armen Poghosyan
doaj   +1 more source

Fermi Surface Reconstruction without Symmetry Breaking

Physical Review X, 2020
We present a sign-problem-free quantum Monte Carlo study of a model that exhibits quantum phase transitions without symmetry breaking and associated changes in the size of the Fermi surface.
Snir Gazit, Fakher F. Assaad, Subir Sachdev   +2 more
doaj   +1 more source

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, Hideaki Oba, Shinji Takeda   +2 more
doaj   +1 more source

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, C. Zeng, C. Zeng, C.N. Yang, C.N. Yang, D.J.J. Farnell, F. Coester, F. Coester, F.E. Harris, H. Kümmel, H.A. Bethe, H.G. Kümmel, J. Hubbard, J. Kanamori, J. Rosenfeld, J. Čižek, J. Čižek, J.S. Arponen, J.S. Arponen, J.S. Arponen, J.S. Arponen, J.S. Arponen, J.S. Arponen, L. Hulthén, M. Roger, M.C. Bounara, M.R. Li, N. E. Ligterink, N.D. Mermin, N.E. Ligterink, P.W. Anderson, R. F. Bishop, R. Kubo, R. Orbach, R.B. Laughlin, R.F. Bishop, R.F. Bishop, R.F. Bishop, R.F. Bishop, R.F. Bishop, R.F. Bishop, R.J. Bartlett, R.J. Baxter, R.R.P. Singh, T. Oguchi, Y. Xian, Z. Weihong   +46 more
core   +2 more sources

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, Jonatan Bohr Brask, Nicolas Brunner   +2 more
doaj   +1 more source

Automata and the susceptibility of the square lattice Ising model modulo powers of primes [PDF]

, 2015
We study the full susceptibility of the Ising model modulo powers of primes. We find exact functional equations for the full susceptibility modulo these primes.
A. Guttmann, J. Maillard
semanticscholar   +1 more source

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, S. V. Iordansky, S. V. Iordansky, S. V. Iordansky, S. E. Korshunov   +4 more
core   +1 more source

Free-Fermion Models and Two-Dimensional Ising Models Under Zero Field and Imaginary Field i(π/2)k_BT

Entropy
The 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
doaj   +1 more source