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Добірка наукової літератури з теми "Pre-Thermalization"

Автор: Grafiati

Опубліковано: 14 березня 2023

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Статті в журналах з теми "Pre-Thermalization"

Kaminishi, Eriko, Takashi Mori, Tatsuhiko N. Ikeda, and Masahito Ueda. "Entanglement pre-thermalization in a one-dimensional Bose gas." Nature Physics 11, no. 12 (September 28, 2015): 1050–56. http://dx.doi.org/10.1038/nphys3478.

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Rajak, Atanu, Roberta Citro, and Emanuele G. Dalla Torre. "Stability and pre-thermalization in chains of classical kicked rotors." Journal of Physics A: Mathematical and Theoretical 51, no. 46 (October 22, 2018): 465001. http://dx.doi.org/10.1088/1751-8121/aae294.

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Wilkin, Francis P., Jorge Cantó, and Alex C. Raga. "On the Energetics and Momentum Distribution of Bow Shocks and Colliding Winds." Symposium - International Astronomical Union 182 (1997): 343–52. http://dx.doi.org/10.1017/s0074180900061763.

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We discuss recent progress in analytic modeling of stellar wind bow shocks and colliding winds. For thin, radiative shocked layers in steady-state, the shape of the layer as well as its internal flux of mass and momentum are found from the conservation laws of mass, momentum and angular momentum. For the case that the shocked gas is well-mixed, the velocity distribution and mass column density of shocked material are also obtained. These solutions are extended to the problem of a jet bow shock, treated as a non-isotropic “wind” interacting with the ambient medium. We also examine the shell energetics for these simple analytic models. The constraint of conservation of momentum leads to an upper limit to the efficiency of thermalization and radiation of the pre-shock wind kinetic energy. Calculations are presented of this thermalization rate as a function of the input momentum rates of the pre-shock winds.

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Masalskyi, O., and J. Gradauskas. "Effect of pre-thermalization of hot carriers on the photovoltage in solar cells." Ukrainian Journal of Physical Optics 23, no. 3 (2022): 117–25. http://dx.doi.org/10.3116/16091833/23/3/117/2022.

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Creamer, S. C., P. C. Rice-Evans, G. A. Gledhill, and J. D. Collins. "Evidence of pre-thermalization trapping of positrons in neutron-irradiated silicon-doped gallium arsenide." Philosophical Magazine B 63, no. 4 (April 1991): 923–30. http://dx.doi.org/10.1080/13642819108205547.

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Eskola, Kari J. "Pre-Thermalization Dynamics: Initial Conditions for QGP at the LHC and RHIC from Perturbative QCD." Progress of Theoretical Physics Supplement 129 (1997): 1–10. http://dx.doi.org/10.1143/ptps.129.1.

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Heitmann, Tjark, Jonas Richter, Dennis Schubert, and Robin Steinigeweg. "Selected applications of typicality to real-time dynamics of quantum many-body systems." Zeitschrift für Naturforschung A 75, no. 5 (May 26, 2020): 421–32. http://dx.doi.org/10.1515/zna-2020-0010.

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AbstractLoosely speaking, the concept of quantum typicality refers to the fact that a single pure state can imitate the full statistical ensemble. This fact has given rise to a rather simple but remarkably useful numerical approach to simulate the dynamics of quantum many-body systems, called dynamical quantum typicality (DQT). In this paper, we give a brief overview of selected applications of DQT, where particular emphasis is given to questions on transport and thermalization in low-dimensional lattice systems like chains or ladders of interacting spins or fermions. For these systems, we discuss that DQT provides an efficient means to obtain time-dependent equilibrium correlation functions for comparatively large Hilbert-space dimensions and long time scales, allowing the quantitative extraction of transport coefficients within the framework of, e. g., linear response theory (LRT). Furthermore, it is discussed that DQT can also be used to study the far-from-equilibrium dynamics resulting from sudden quench scenarios, where the initial state is a thermal Gibbs state of the pre-quench Hamiltonian. Eventually, we summarize a few combinations of DQT with other approaches such as numerical linked cluster expansions or projection operator techniques. In this way, we demonstrate the versatility of DQT.

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Fu, Dianzheng, Tianji Yang, Yize Huang, and Yiming Tong. "Integrated Optimization for Biofuel Management Associated with a Biomass-Penetrated Heating System under Multiple and Compound Uncertainties." Energies 15, no. 15 (July 26, 2022): 5406. http://dx.doi.org/10.3390/en15155406.

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The biofuel management of a biofuel-penetrated district heating system is complicated due to its association with multiple and polymorphic uncertainties. To handle uncertainties and system dynamic complexities, an inexact two-stage compound-stochastic mixed-integer programming technique is proposed, innovatively based on the integration of different uncertain optimization approaches. The proposed technique can not only address the inexact recourse problems sourced from multiple and compound uncertainties existing in the pre-regulated biofuel supply–demand match mode, but can also quantitatively analyze the conflicts between the economic target that minimizes the system cost and the risk preference that maximizes the heating service satisfaction. The developed model is applied to a real-world biofuel management case study of a district heating system to obtain the optimal biofuel management schemes subject to supply–demand, policy requirement constraints, and the financial minimization objective. The results indicate that biofuel allocation and expansion schemes are sensitive to the multiple and compound uncertainty inputs, and the corresponding biofuel-deficit change trends of three heat sources are obviously distinct with the system’s condition, varying due to the complicated interactions of the system’s components. Beyond that, a potential trade-off relationship between the heating cost and the constraint-violation risk can be obtained by observing system responses with thermalization coefficient varying.

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Messias, Andresa, Denys E. S. Santos, Frederico J. S. Pontes, Filipe S. Lima, and Thereza A. Soares. "Out of Sight, Out of Mind: The Effect of the Equilibration Protocol on the Structural Ensembles of Charged Glycolipid Bilayers." Molecules 25, no. 21 (November 4, 2020): 5120. http://dx.doi.org/10.3390/molecules25215120.

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Molecular dynamics (MD) simulations represent an essential tool in the toolbox of modern chemistry, enabling the prediction of experimental observables for a variety of chemical systems and processes and majorly impacting the study of biological membranes. However, the chemical diversity of complex lipids beyond phospholipids brings new challenges to well-established protocols used in MD simulations of soft matter and requires continuous assessment to ensure simulation reproducibility and minimize unphysical behavior. Lipopolysaccharides (LPS) are highly charged glycolipids whose aggregation in a lamellar arrangement requires the binding of numerous cations to oppositely charged groups deep inside the membrane. The delicate balance between the fully hydrated carbohydrate region and the smaller hydrophobic core makes LPS membranes very sensitive to the choice of equilibration protocol. In this work, we show that the protocol successfully used to equilibrate phospholipid bilayers when applied to complex lipopolysaccharide membranes occasionally leads to a small expansion of the simulation box very early in the equilibration phase. Although the use of a barostat algorithm controls the system dimension and particle distances according to the target pressure, fluctuation in the fleeting pressure occasionally enables a few water molecules to trickle into the hydrophobic region of the membrane, with spurious solvent buildup. We show that this effect stems from the initial steps of NPT equilibration, where initial pressure can be fairly high. This can be solved with the use of a stepwise-thermalization NVT/NPT protocol, as demonstrated for atomistic MD simulations of LPS/DPPE and lipid-A membranes in the presence of different salts using an extension of the GROMOS forcefield within the GROMACS software. This equilibration protocol should be standard procedure for the generation of consistent structural ensembles of charged glycolipids starting from atomic coordinates not previously pre-equilibrated. Although different ways to deal with this issue can be envisioned, we investigated one alternative that could be readily available in major MD engines with general users in mind.

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Gelis, François. "Initial state and thermalization in the Color Glass Condensate framework." International Journal of Modern Physics E 24, no. 10 (October 2015): 1530008. http://dx.doi.org/10.1142/s0218301315300088.

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In this review, I present the description of the early stages of heavy ion collisions at high energy in the Color Glass Condensate framework, from the pre-collision high energy nuclear wave function to the point where hydrodynamics may start becoming applicable.

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Дисертації з теми "Pre-Thermalization"

Huang, Chen-How, and 黃承浩. "Pre-thermalization and spin-changing collisions after ramping up the strength of a SU(N)-symmetry breaking interaction in an SU(N) Fermi Gas." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/uwe3c8.

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碩士
國立清華大學
物理學系
105
We explore the short-time evolution of an SU(N) Fermi-liquid following the quench of a SU(N)-symmetry interaction. The conditions for the existence of a pre-thermalized regime after turning on the interaction strength are analyzed. We find that spin-changing collisions play an important role in suppressing pre-thermalization for spin-polarized initial states. For an unpolarized (i.e. SU$(N)$ symmetric) initial ground state, a pre-thermalized regime is observed, which is robust to presence of (SU$(N)$-symmetric) interactions in the initial state. We also study the short-time dynamics for finite-time ramps of the interaction strength. For long ramp-time, the value of the discontinuity approaches the equilibrium value of the post-quench Hamiltonian.

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