نتایج جستجو برای: nanostructure and phase transition
تعداد نتایج: 16969299 فیلتر نتایج به سال:
We consider a pair of parallel Dp−1 and anti-Dp−1 branes in flat space, with a finite separation d along some perpendicular spatial direction and at finite temperature. If this spatial direction is compactified on a circle then by T-duality, the system is equivalent to a Dp-antiDp pair wrapped around the dual circle with a constant Wilson line A ≈ d on one of the branes. We focus in particular ...
Background: Infant's transition is a challenge for parents and the health system that requires ongoing assessment and management to improve each newborn`s growth and development. The purpose of this study was to explore the management of infant` transition from neonatal intensive care unit (NICU) to home.Materials and Methods: We used a grounded theory study to explore and describe the manageme...
We consider properties of critical points in the interacting boson model, corresponding to flat-bottomed potentials as encountered in a second-order phase transition between spherical and deformed γ-unstable nuclei. We show that intrinsic states with an effective β-deformation reproduce the dynamics of the underlying non-rigid shapes. The effective deformation can be determined from the the glo...
Schwinger-Dyson equations are used to study the large N limit of U(N) gauge theory on several small lattices. Explicit solutions are found which are beyond the reach of existing steepest descent technique. They show a phase transition in a three placquette model at coupling gN = 3, resembling the known transition in the one placquette model, and lending support to expectations of a similar tran...
Fractals at T = T c due to instanton-like configurations Abstract We investigate the geometry of the critical fluctuations for a general system undergoing a thermal second order phase transition. Adopting a generalized effective action for the local description of the fluctuations of the order parameter at the critical point (T = T c) we show that instanton-like configurations, corresponding to...
In this contribution we will shortly review the main mechanism through which primordial magnetic fields may affect the electroweak baryogenesis. It is shown that although strong magnetic fields might enhance the strength of the electroweak phase transition, no benefit is found for baryogenesis once the effect of the field on the sphaleron rate is taken into account. The possible role of hyperma...
It has been recently shown that the observed baryon number may originate at the electroweak phase transition, provided that the Higgs boson and the lightest stop are sufficiently light. In this work, we perform a detailed analysis , including all dominant two-loop finite temperature corrections to the Higgs effective potential, as well as the non-trivial effects proceeding from the mixing in th...
We investigate the influence of the granularity of the lattice on the potential between monopoles. Using the flux definition of monopoles we introduce their centers of mass and are able to realize continuous shifts of the monopole positions. We find periodic deviations from the 1/r-behavior of the monopole-antimonopole potential leading to local extrema. We suppose that these meta-stabilities m...
In this work, we report our results on the phase transition of a flexible homopolymer from a stretched chain to a compact globule. The Wang-landau method is used to study the thermodynamic properties of a the chain up to 512 monomers. We believe that the peak in the specific heat at low temperature T ≈ 0.05 for small chain sizes N < 100 is a clear evidence of the existence of metastable helical...
We formulate a simplified model of a limit order book, in which the arrival process is independent of the current state. We prove a phase transition result: there exist prices κb and κa such that, for any > 0, only finitely many bid (ask) departures occur at prices below κb− (above κa + ), while the interval (κb + , κa − ) infinitely often contains no bids, and infinitely often contains no asks...
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