Results 31 to 40 of about 32,713 (278)
Fisher zeros and persistent temporal oscillations in nonunitary quantum circuits
Physical Review Research, 2022 We present a quantum circuit with measurements and postselection that exhibits a panoply of space- and/or time-ordered phases from ferromagnetic order to spin-density waves to time crystals. Unlike the time crystals that have been found in unitary models,
Sankhya Basu +4 more
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Fermions as generalized Ising models
Nuclear Physics B, 2017 We establish a general map between Grassmann functionals for fermions and probability or weight distributions for Ising spins. The equivalence between the two formulations is based on identical transfer matrices and expectation values of products of ...
C. Wetterich
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Efficient variational contraction of two-dimensional tensor networks with a non-trivial unit cell [PDF]
Quantum, 2020 Tensor network states provide an efficient class of states that faithfully capture strongly correlated quantum models and systems in classical statistical mechanics.
A. Nietner +4 more
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Analysis of the phase transition for the Ising model on the frustrated square lattice [PDF]
Physical Review B, 2011 10 pages, 4 ...
Kalz, A., Honecker, A., Moliner, M.
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Two dimentional lattice vibrations from direct product representations of symmetry groups
International Journal of Mathematics and Mathematical Sciences, 1983 Arrangements of point masses and ideal harmonic springs are used to model two dimensional crystals. First, the Born cyclic condition is applied to a double chain composed of coupled linear lattices to obtain a cylindrical arrangement.
J. N. Boyd, P. N. Raychowdhury
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Anisotropic scaling of the two-dimensional Ising model II: surfaces and boundary fields
SciPost Physics, 2020 Based on the results published recently [SciPost Phys. 7, 026 (2019)], the influence of surfaces and boundary fields are calculated for the ferromagnetic anisotropic square lattice Ising model on finite lattices as well as in the finite-size scaling ...
Hendrik Hobrecht, Alfred Hucht
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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
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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
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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
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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 +2 more
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