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17 papers · 1 filter
Modelling financial markets by the multiplicative sequence of trades
Vygintas Gontis, Bronislovas Kaulakys
We introduce the stochastic multiplicative point process modelling trading activity of financial markets. Such a model system exhibits power-law spectral density S(f) ~ 1/f**beta,…
Effective magnetic fields in degenerate atomic gases induced by light beams with orbital angular momenta
G. Juzeliunas, P. Ohberg, J. Ruseckas +1
We investigate the influence of two resonant laser beams on the mechanical properties of degenerate atomic gases. The control and probe beams of light are considered to have Orbita…
Atomic theory methods for the polarization in photon and electron interactions with atoms
A. Kupliauskiene
An alternative method to the density matrix formalism for the derivation of general expressions of the interaction of polarized atoms with polarized photons and electrons is presen…
Whole Earth Telescope observations of BPM 37093: a seismological test of crystallization theory in white dwarfs
A. Kanaan, A. Nitta, D. E. Winget +3
BPM 37093 is the only hydrogen-atmosphere white dwarf currently known which has sufficient mass (~ 1.1 M_sun) to theoretically crystallize while still inside the ZZ Ceti instabilit…
Time problem in quantum mechanics and its analysis by the concept of weak measurement
J. Ruseckas, B. Kaulakys
The model of weak measurements is applied to various problems, related to the time problem in quantum mechanics. The review and generalization of the theoretical analysis of the ti…
Stochastic nonlinear differential equation generating 1/f noise
B. Kaulakys, J. Ruseckas
Starting from the simple point process model of 1/f noise we derive a stochastic nonlinear differential equation for the signal exhibiting 1/f noise in any desirably wide range of…