Bibliografias temáticas / Bosonic analytic continuation

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Literatura científica selecionada sobre o tema "Bosonic analytic continuation"

Autor: Grafiati
Publicado: 29 de março de 2025

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Artigos de revistas sobre o assunto "Bosonic analytic continuation"

1

Ong, Perkins Jon, and Danilo M. Yanga. "Damping of spin waves in high-Tc superconductors in the spin polaron formulation." International Journal of Modern Physics B 32, no. 15 (2018): 1850190. http://dx.doi.org/10.1142/s0217979218501904.

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The damping of spin waves in high-T[Formula: see text] superconductors is investigated in this paper. We use the spin polaron formulation in the finite temperature (Matsubara) Green’s function method in a representation, where holes are described as spinless fermions (holons) and spins as normal bosons characterized by the hard-core bosonic operators in accordance with the Holstein–Primakoff transformation. The interaction of holes with spin waves is then described by a Hamiltonian, which resembles the conventional polaron problem and came to be known as the spin polaron Hamiltonian. The rate
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BRESSLOFF, P. C., J. G. TAYLOR, and A. RESTUCCIA. "A FUNCTIONAL LIGHT-CONE GAUGE CONSTRUCTION OF A BOSONIC STRING COMPACTIFIED ON A TORUS." International Journal of Modern Physics A 03, no. 02 (1988): 451–86. http://dx.doi.org/10.1142/s0217751x88000175.

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The closed bosonic string compactified on a torus is decomposed into two open strings corresponding to left and right movers respectively. Multiloop amplitudes are expressed as a product of a holomorphic and an anti-holomorphic function of the moduli of the world-sheet Riemann surface. Such a product is obtained by analytically continuing left and right open string amplitudes such that one is the complex conjugate of the other. A justification for this analytic continuation is provided using a second quantized field theory of strings. The extra parameters needed for complexification are shown
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3

Ng, K. K. "Bilayered Spin-S Heisenberg Model in Fractional Dimensions." International Journal of Modern Physics B 12, no. 18 (1998): 1809–12. http://dx.doi.org/10.1142/s0217979298001034.

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The ground state and the phase transitions of the bilayered spin-S anti-ferromagnetic Heisenberg model were studied by Ng et al.1 by using the Schwinger boson mean field theory. In this paper, an analytic continuation of the self-consistent equations is carried out in order to study the extension of the model to fractional dimensions from 1 to 2. Decreasing the dimensionality from 2 has an effect similar to that of decreasing the spin S. The corresponding phase diagram and phase transition will also be discussed.
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MANDAL, GAUTAM, ANIRVAN M. SENGUPTA, and SPENTA R. WADIA. "INTERACTIONS AND SCATTERING IN d = 1 STRING THEORY." Modern Physics Letters A 06, no. 16 (1991): 1465–77. http://dx.doi.org/10.1142/s0217732391001585.

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We discuss two results: (i) we calculate the two-point function of the density fluctuations to [Formula: see text] in the fermonic formulation of the d = 1 string theory and compare with the [Formula: see text] result from the candidate collective field Hamiltonian. The latter result is divergent, showing the inequivalence of the two theories. We find out the corrections to the collective field Hamiltonian (both in the form of infinite counterterms and additional finite pieces) needed to match with the fermion theory. (ii) We study tree-level scattering processes between bosons due to the loca
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5

Ostrovska, Sofiya. "On the properties of the limit q-Bernstein operator." Studia Scientiarum Mathematicarum Hungarica 48, no. 2 (2011): 160–79. http://dx.doi.org/10.1556/sscmath.48.2011.2.1164.

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The limit q-Bernstein operator Bq = B∞,q: C[0, 1] → C[0, 1] emerges naturally as a q-version of the Szász-Mirakyan operator related to the q-deformed Poisson distribution. The latter is used in the q-boson theory to describe the energy distribution in a q-analogue of the coherent state.The limit q-Bernstein operator has been widely studied lately. It has been shown that Bq is a positive shape-preserving linear operator on C[0, 1] with ‖Bq‖ = 1. Its approximation properties, probabilistic interpretation, behavior of iterates, and the impact on the smoothness have been examined.In this paper, it
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6

Feng, Xin, Xu Wang, and Yue Zhang. "Research on public emotional polarization and public opinion evolution of OTC and learning during the COVID-19 epidemic: taking the topic of OTC on Zhihu as an example." Library Hi Tech 40, no. 2 (2021): 286–303. http://dx.doi.org/10.1108/lht-09-2021-0323.

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PurposeThe outbreak and continuation of COVID-19 have spawned the transformation of traditional teaching models to a certain extent. The Chinese Ministry of Education’s guidance on “keep learning and teaching during class suspension” has made OTC and learning (OTC) become routinized, and the public’s emotional attitudes toward OTC have also evolved over time. The purpose of this study is to segment the emotional text data and introduce it into the topic model to reveal the evolution process and stage characteristics of public emotional polarity and public opinion of OTC topics during public he
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7

Nogaki, Kosuke, and Hiroshi Shinaoka. "Bosonic Nevanlinna Analytic Continuation." Journal of the Physical Society of Japan 92, no. 3 (2023). http://dx.doi.org/10.7566/jpsj.92.035001.

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8

Neuhaus, James, Nathan S. Nichols, Debshikha Banerjee, et al. "SmoQyDEAC.jl: A differential evolution package for the analytic continuation of imaginary time correlation functions." SciPost Physics Codebases, November 12, 2024. http://dx.doi.org/10.21468/scipostphyscodeb.39.

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We introduce the SmoQyDEAC.jl package, a Julia implementation of the Differential Evolution Analytic Continuation (DEAC) algorithm [N. S. Nichols et al., Phys. Rev. E 106, 025312 (2022)] for analytically continuing noisy imaginary time correlation functions to the real frequency axis. Our implementation supports fermionic and bosonic correlation functions on either the imaginary time or Matsubara frequency axes, and treatment of the covariance error in the input data. This paper presents an overview of the DEAC algorithm and the features implemented in the SmoQyDEAC.jl package. It also provide
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Neuhaus, James, Nathan S. Nichols, Debshikha Banerjee, et al. "Codebase release r1.1 for SmoQyDEAC.jl." SciPost Physics Codebases, November 12, 2024. http://dx.doi.org/10.21468/scipostphyscodeb.39-r1.1.

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We introduce the SmoQyDEAC.jl package, a Julia implementation of the Differential Evolution Analytic Continuation (DEAC) algorithm [N. S. Nichols et al., Phys. Rev. E 106, 025312 (2022)] for analytically continuing noisy imaginary time correlation functions to the real frequency axis. Our implementation supports fermionic and bosonic correlation functions on either the imaginary time or Matsubara frequency axes, and treatment of the covariance error in the input data. This paper presents an overview of the DEAC algorithm and the features implemented in the SmoQyDEAC.jl package. It also provide
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10

Palermo, A., M. Buzzegoli, and F. Becattini. "Exact equilibrium distributions in statistical quantum field theory with rotation and acceleration: Dirac field." Journal of High Energy Physics 2021, no. 10 (2021). http://dx.doi.org/10.1007/jhep10(2021)077.

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Abstract We derive the general exact forms of the Wigner function, of mean values of conserved currents, of the spin density matrix, of the spin polarization vector and of the distribution function of massless particles for the free Dirac field at global thermodynamic equilibrium with rotation and acceleration, extending our previous results obtained for the scalar field. The solutions are obtained by means of an iterative method and analytic continuation, which lead to formal series in thermal vorticity. In order to obtain finite values, we extend to the fermionic case the method of analytic
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Teses / dissertações sobre o assunto "Bosonic analytic continuation"

1

Rotella, Francesco. "Theoretical methods for the role of correlations on high-Tc superconductivity." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP181.

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Cette thèse comprend deux projets distincts. Nous avons développé et testé un modèle d’intelligence artificielle pour résoudre des problèmes de prolongement analytique bosonique, c’est-à-dire pour générer la conductivité optique correcte à partir de la fonction de corrélation courant-courant. Des travaux récents ont démontré que les réseaux neuronaux peuvent surpasser les méthodes d’entropie maximale pour le prolongement analytique des fonctions de Green de Matsubara bruitées en physique des systèmes à plusieurs corps, tant en termes de précision que de coût de calcul. Ici, nous généralisons c
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