Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Diakonos, Fotis K."'
We show that the spontaneous symmetry breaking can be defined also for finite systems based on the properly defined jump probability between the ground states in the 2d and 3d Ising models on a square and a cubic lattice respectively. Our analysis re
Externí odkaz:
http://arxiv.org/abs/2104.11662
Publikováno v:
Phys. Rev. C 102, 064324 (2020)
The properties of neutron matter are integral to the correct description of neutron stars as well as the description of neutron-rich nuclei. One key property of neutron matter is its superfluid behaviour in a range of densities relevant to the inner
Externí odkaz:
http://arxiv.org/abs/2005.05985
Autor:
Diakonos, Fotis K., Schmelcher, Peter
We present a variational approach which shows that the wave functions belonging to quantum systems in different potential landscapes, are pairwise linked to each other through a generalized continuity equation. This equation contains a source term pr
Externí odkaz:
http://arxiv.org/abs/1811.02843
Autor:
Spourdalakis, Aris G. B., Pappas, George, Morfonios, Christian V., Kalozoumis, Panayotis A., Diakonos, Fotis K., Schmelcher, Peter
Publikováno v:
Phys. Rev. A 94, 052122 (2016)
A variational scheme for the derivation of generalized, symmetry-induced continuity equations for Hermitian and non-Hermitian quantum mechanical systems is developed. We introduce a Lagrangian which involves two complex wave fields and whose global i
Externí odkaz:
http://arxiv.org/abs/1607.06730
Publikováno v:
Phys. Rev. E 93, 052215 (2016)
Time-averaged two-point currents are derived and shown to be spatially invariant within domains of local translation or inversion symmetry for arbitrary time-periodic quantum systems in one dimension. These currents are shown to provide a valuable to
Externí odkaz:
http://arxiv.org/abs/1511.05051
We define auto- and cross-correlation functions capable to capture dynamical characteristics induced by local phase space structures in a general dynamical system. These correlation functions are calculated in the Standard Map for a range of values o
Externí odkaz:
http://arxiv.org/abs/1504.05081
Autor:
Kalimeri, Maria, Constantoudis, Vassilios, Papadimitriou, Constantinos, Karamanos, Konstantinos, Diakonos, Fotis K., Papageorgiou, Harris
We study the frequency distributions and correlations of the word lengths of ten European languages. Our findings indicate that a) the word-length distribution of short words quantified by the mean value and the entropy distinguishes the Uralic (Finn
Externí odkaz:
http://arxiv.org/abs/1401.6224
Entropy analysis of word-length series of natural language texts: Effects of text language and genre
Autor:
Kalimeri, Maria, Constantoudis, Vassilios, Papadimitriou, Constantinos, Karamanos, Kostantinos, Diakonos, Fotis K., Papageorgiou, Haris
Publikováno v:
International Journal of Bifurcation and Chaos, 22, 1250223, (2012)
We estimate the $n$-gram entropies of natural language texts in word-length representation and find that these are sensitive to text language and genre. We attribute this sensitivity to changes in the probability distribution of the lengths of single
Externí odkaz:
http://arxiv.org/abs/1401.4205
Cross-correlations are usually considered to emerge through interaction between particles. Here we present a mechanism capable to generate power-law cross-correlations between non-interacting particles exposed to an external potential. This phenomeno
Externí odkaz:
http://arxiv.org/abs/1303.3577
Publikováno v:
New J. Phys. 14, 103032 (2012)
We demonstrate that long-range interactions can cause, as time evolves, consecutive reversals of directed currents for dilute ensembles of particles in driven lattices. These current-reversals are based on a general mechanism which leads to an intera
Externí odkaz:
http://arxiv.org/abs/1202.4900