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of 113
pro vyhledávání: '"DANTCHEV, DANIEL"'
We derive exact results for the critical Casimir force (CCF) within the Nagle-Kardar model with periodic boundary conditions (PBC's). The model represents one-dimensional Ising chain with long-range equivalent-neighbor ferromagnetic interactions of s
Externí odkaz:
http://arxiv.org/abs/2404.18324
Autor:
Dantchev, Daniel, Tonchev, Nicholay
Fluctuations exist in any material object $A$. If $A$ has non-zero temperature $T$, one speaks about thermal fluctuations. If $A$ is at very low $T$, the fluctuations are of quantum origin. Interesting effects appear if two bodies $A$ and $B$ are sep
Externí odkaz:
http://arxiv.org/abs/2403.17109
Autor:
Dantchev, Daniel
Publikováno v:
extended version published in Entropy 2024, 26, 499
On the examples of the quantum-electrodynamical Casimir force, as well as critical Casimir and Helmholtz forces, we present a review of some results available for the class of fluctuation induced forces. In addition, we also concisely present example
Externí odkaz:
http://arxiv.org/abs/2307.09990
Autor:
Dantchev, Daniel, Rudnick, Joseph
Publikováno v:
Phys. Rev. E 106, L042103 (2022)
We obtain exact closed-form expressions for the partition function of the one-dimensional Ising model in the fixed-$M$ ensemble, for three commonly-used boundary conditions: periodic, antiperiodic and Dirichlet. These expressions allow for the determ
Externí odkaz:
http://arxiv.org/abs/2207.01134
Autor:
Dantchev, Daniel1,2 (AUTHOR) danieldantchev@gmail.com
Publikováno v:
Entropy. Jun2024, Vol. 26 Issue 6, p499. 28p.
We study the behaviour of the non-retarded van der Waals force between a planar substrate and a single-walled carbon nanotube, assuming that the system is immersed in a liquid medium which exerts hydrostatic pressure on the tube's surface, thereby al
Externí odkaz:
http://arxiv.org/abs/1911.06779
Autor:
Dantchev, Daniel
Recently it has been suggested that relativistic Bose gas of some type can be playing role in issues like dark matter, dark energy, and in some cosmological problems. In the current article we investigate one known exactly solvable model of three-dim
Externí odkaz:
http://arxiv.org/abs/1906.03426
Publikováno v:
Physica A: Statistical Mechanics and its Applications 522C (2019) pp. 324-338
We present an analytical solution of an effective field theory which, in one of its formulations, is equivalent to the Ginzburg's $\Psi$-theory for the behavior of the Casimir force in a film of $^4$He in equilibrium with its vapor near the superflui
Externí odkaz:
http://arxiv.org/abs/1903.04917
We present an analytical solution of the Ginzburg's $\Psi$-theory for the behavior of the Casimir force in a film of $^4$He in equilibrium with its vapor near the superfluid transition point, and we revisit the corresponding experiments in light of o
Externí odkaz:
http://arxiv.org/abs/1803.08998
Autor:
Nikolova, Gergana1 gerana1973@gmail.com, Dantchev, Daniel1 daniel@imbm.bas.bg, Tsveov, Mihail1 mtsveov@abv.bg
Publikováno v:
Vibroengineering Procedia. Sep2023, Vol. 50, p125-130. 6p.