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2 days ago · Edward Teller Teller Ede Teller in 1958 Born (1908-01-15) January 15, 1908 Budapest, Austria-Hungary Died September 9, 2003 (2003-09-09) (aged 95) Stanford, California, U.S. Citizenship Hungary United States (March 6, 1941) Alma mater University of Karlsruhe (BS) University of Munich University of Leipzig (PhD) Known for Hydrogen bomb Teller–Ulam design Ashkin–Teller model Brunauer ...
May 30, 2024 · Hyperuniformity in Ashkin-Teller model. We show that equilibrium systems in d dimension that obey the inequality dν > 2, known as Harris criterion, exhibit suppressed energy fluctuation in their critical state. Ashkin-Teller model is an example in d = 2 where the correlation length exponent ν varies continuously with the inter-spin ...
May 14, 2024 · We check this numerically for Ising and Ashkin-Teller models by using Monte Carlo simulations, and show that whether a universal coefficient of the logarithmic term can be observed numerically may strongly depend on the geometry and boundary condictions of the system.
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May 13, 2024 · In this regime, we identify an interesting signature of Ashkin-Teller criticality in four-site plaquette singlet correlations at wave vector (π, π); this is in addition to the expected critical fluctuations of the conventional p-VBS order parameter at wave vectors (π, 0) and (0, π).
3 days ago · The Ising model (or Lenz–Ising model), named after the physicists Ernst Ising and Wilhelm Lenz, is a mathematical model of ferromagnetism in statistical mechanics. The model consists of discrete variables that represent magnetic dipole moments of atomic "spins" that can be in one of two states (+1 or −1).
May 30, 2024 · Ashkin-Teller model is an example in $d=2$ where the correlation length exponent $\nu$ varies continuously with the inter-spin interaction strength $\lambda$ and exceeds the value $d/2$ set by Harris criterion when $\lambda$ is negative; there, the variance of the subsystem energy across a length scale $l$ varies as $l^{d-\alpha}$ with ...
