Search Results - "phase transitions"
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Elastic phase transitions in metals at high pressures
Published 2014“…Transitions of this type are called elastic phase transitions. In this paper, elastic phase transitions in metals with cubic and hexagonal structures are considered. …”
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Phase transition of p-adic Ising λ-model
Published 2015“…In this work we have proved the existence of the phase transition occurs for the model.…”
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On phase transitions in Quantum Markov Chains on Cayley tree
Published 2011“…Surprisingly in this case, we establish a phase transition (i.e. existence of two distinct quantum Markov chains) for the considered model on the Cayley tree order 3.…”
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Theory of phase transitions in ferroelectric superlattices / Lim Kok Geng
Published 2015“…A thermodynamic model based on the Landau-Ginzburg theory is proposed to study the phase transitions in ferroelectric superlattices. An interface energy term is introduced in the free energy to describe the formation of intermixed layer with properties different from those of both layers. …”
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Ground states and phase transition of the λ model on the Cayley tree
Published 2018“…We describe the model ground states and prove that translation-invariant Gibb measures exist, which means that a phase transition exists. We establish that two-periodic Gibbs measures exist.…”
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Large deviations and dynamical phase transitions for quantum Markov processes
Published 2014“…We provide a natural decomposition for quantum Markov chains into phases, paving the way for the rigorous treatment of critical features of such systems such as phase transitions and phase purification. A full characterisation of dynamical phase transitions beyond properties of the steady state is described in terms of a dynamical perspective through critical behaviour of the quantum jump trajectories. …”
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Absorbing state phase transition with competing quantum and classical fluctuations
Published 2016“…Here we theoretically address such a scenario in an open quantum spin model which in its classical limit undergoes a directed percolation phase transition. By mapping the problem to a non-equilibrium field theory, we show that the introduction of quantum fluctuations stemming from coherent, rather than statistical, spin-flips alters the nature of the transition such that it becomes first-order. …”
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Metrology, metastability and dynamical phase transitions in open quantum systems
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Dynamical phase transitions as a resource for quantum enhanced metrology
Published 2016“…We show that when the open quantum system undergoes a first-order dynamical phase transition the quantum Fisher information (QFI), which gives the upper bound on the achievable precision of any measurement of the system and environment, becomes quadratic in observation time (cf. …”
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Phase transitions in the Blume-Emery-Griffiths model on Cayley tree
Published 2012“…We consider the Blume-Emery-Griffiths model on the Cayley tree and investigate the problem of phase transition. It is found the exact value for the critical temperature and described the region of phase transition.…”
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Influence of Temperature and Anisotropic Pressure on the Phase Transitions in α-Cristobalite
Published 2008“…The role of temperature and anisotropy of the applied load in the pressure–induced transformations of α -cristobalite is investigated by means of first principles molecular dynamics combined with the metadynamics algorithm for the study of solid-solid phase transitions. We reproduce the transition to α-PbO2 as found in experiments and we observe that the transition paths are qualitatively different and yield different products when a nonhydrostatic load is applied, giving rise to a new class of metastable structures with mixed tetrahedral and octahedral coordination.…”
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The minimization of mechanical work in vibrated granular matter
Published 2016Subjects: “…Phase transitions…”
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On P-Adic lambda-model on the cayley tree II: Phase transitions
Published 2015“…In the p-adic setting there are several kinds of phase transitions such as storing phase transition, phase transition in terms of the generalized p-adic quasi Gibbs measures. …”
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Phase transitions in electron spin resonance under continuous microwave driving
Published 2017“…This approach allows us to identify steady state phase transitions between phases of high and low polarization controlled by the distribution of disordered electronic interactions. …”
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Phase diagram and phase transitions of the Potts model with external magnetic field
Published 2009“…The physical phenomenon of phase transition is reflected in mathematical model by non-uniqueness of the Gibbs measures and phase diagram of the model describes a morphology of phases, stability of phases, different transitions from one phase to another and corresponding transition lines. …”
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The blume-emery-griffiths model on Cayley tree and its phase transitions
Published 2013“…It is compared the phase transition regions RA and RA.…”
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Phase transition for the p-adic Ising–Vannimenus model on the Cayley tree
Published 2014“…The main result of this paper is to establish the existence of the phase transition for the model. By the phase transition we mean the existence of at least two non-trivial p-adic quasi Gibbs measures, such that one is bounded and the second one is unbounded (note that in the p-adic probability, unlike a real setting, the probability measures could even be unbounded). …”
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