Non-classical critical exponents at Bose–Einstein condensation
نویسندگان
چکیده
منابع مشابه
On the theory of BoseEinstein condensation of quasiparticles: on the possibility of condensation of ferromagnons at high temperatures
The Bose condensation of magnons in physical systems of finite size is considered for the case of ferromagnetic thin films. It is shown that in accordance with present-day experimental capabilities, which permit one to achieve densities of longwavelength spin excitations of ∼ 1018 – 1019 −3 , in such films, the formation of a coherent condensate of such quasiparticles begins at temperatures T ∼...
متن کاملLyapunov Exponents for Non-classical Multidimensional Continued Fraction Algorithms
We introduce a simple geometrical two-dimensional continued fraction algorithm inspired from dynamical renormalization. We prove that the algorithm is weakly convergent, and that the associated transformation admits an ergodic absolutely continuous invariant probability measure. Following Lagarias, its Lyapunov exponents are related to the approximation exponents which measure the diophantine q...
متن کاملCrossover scaling from classical to non-classical critical behaviour
Interacting physical systems in the neighborhood of criticality (and massive continuum field theories) can often be characterized by just two physical scales: a (macroscopic) correlation length and a (microscopic) interaction range, related to the coupling and measured by the Ginzburg number G. A critical crossover limit can be defined when both scales become large while their ratio stays finit...
متن کاملNon trivial critical exponents for finite temperature chiral transitions at fixed total fermion number
We analyze the finite temperature chiral restoration transition of the (D = d + 1)dimensional Gross-Neveu model for the case of a large number of flavors and fixed total fermion number. This leads to the study of the model with a nonzero imaginary chemical potential. In this formulation of the theory, we have obtained that, in the transition region, the model is described by a chiral conformal ...
متن کاملCompact analytical form for non - zeta terms in critical exponents at order 1 / N 3
We simplify, to a single integral of dilogarithms, the least tractable O(1/N) contribution to the large-N critical exponent η of the non-linear σ-model, and hence φ-theory, for any spacetime dimensionality, D. It is the sole generator of irreducible multiple zeta values in ε-expansions with D = 2− 2ε, for the σ-model, and D = 4− 2ε, for φ-theory. In both cases we confirm results of Broadhurst, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Statistical Mechanics: Theory and Experiment
سال: 2019
ISSN: 1742-5468
DOI: 10.1088/1742-5468/ab4984