scholarly journals Response to Comment on “The role of electron-electron interactions in two-dimensional Dirac fermions”

Science ◽  
2019 ◽  
Vol 366 (6470) ◽  
pp. eaav8877
Author(s):  
Ho-Kin Tang ◽  
J. N. Leaw ◽  
J. N. B. Rodrigues ◽  
I. F. Herbut ◽  
P. Sengupta ◽  
...  
Keyword(s):  
Critical Point ◽  
Finite Size ◽  
Numerical Data ◽  
Fermi Velocity ◽  
Dirac Fermions ◽  
Two Dimensional ◽  
Zero Energy ◽  
Long Range Interactions ◽  
Rule Out

Hesselmann et al. question one of our conclusions: the suppression of Fermi velocity at the Gross-Neveu critical point for the specific case of vanishing long-range interactions and at zero energy. The possibility they raise could occur in any finite-size extrapolation of numerical data. Although we cannot definitively rule out this possibility, we provide mathematical bounds on its likelihood.

scholarly journals Comment on “The role of electron-electron interactions in two-dimensional Dirac fermions”

Science ◽  
2019 ◽  
Vol 366 (6470) ◽  
pp. eaav6869 ◽  
Author(s):  
S. Hesselmann ◽  
T. C. Lang ◽  
M. Schuler ◽  
S. Wessel ◽  
A. M. Läuchli
Keyword(s):  
Critical Point ◽  
Quantum Critical Point ◽  
Finite Size ◽  
Numerical Data ◽  
Research Articles ◽  
Fermi Velocity ◽  
Dirac Fermions ◽  
Two Dimensional ◽  
Coulomb Interactions

Tang et al. (Research Articles, 10 August 2018, p. 570) report on the properties of Dirac fermions with both on-site and Coulomb interactions. The substantial decrease, up to ~40%, of the Fermi velocity of Dirac fermions with on-site interaction is inconsistent with the numerical data near the Gross-Neveu quantum critical point. This results from an inappropriate finite-size extrapolation.

scholarly journals Wake and wave resistance on viscous thin films

2016 ◽  
Vol 792 ◽  
pp. 829-849 ◽  
Author(s):  
René Ledesma-Alonso ◽  
Michael Benzaquen ◽  
Thomas Salez ◽  
Elie Raphaël
Keyword(s):  
Pressure Field ◽  
Finite Size ◽  
External Source ◽  
External Pressure ◽  
Wave Resistance ◽  
Two Dimensional ◽  
Pressure Source ◽  
One Dimensional ◽  
Speed Up

The effect of an external pressure disturbance, being displaced with a constant speed along the free surface of a viscous thin film, is studied theoretically in the lubrication approximation in one- and two-dimensional geometries. In the comoving frame, the imposed pressure field creates a stationary deformation of the interface – a wake – that spatially vanishes in the far region. The shape of the wake and the way it vanishes depend on both the speed and size of the external source and the properties of the film. The wave resistance, namely the force that has to be externally furnished in order to maintain the wake, is analysed in detail. For finite-size pressure disturbances, it increases with the speed, up to a certain transition value, above which a monotonic decrease occurs. The role of the horizontal extent of the pressure field is studied as well, revealing that for a smaller disturbance the latter transition occurs at a higher speed. Eventually, for a Dirac pressure source, the wave resistance either saturates for a one-dimensional geometry, or diverges for a two-dimensional geometry.

Density of Loosely Bound States in a Triatomic Molecule: The Role of Long Range Interactions

2001 ◽  
Vol 215 (8) ◽  
Author(s):  
S. Heilliette ◽  
A. Delon ◽  
D.T. Jost ◽  
S.Yu. Grebenshchikov ◽  
R. Schinke ◽  
...  
Keyword(s):  
Long Range ◽  
Bound States ◽  
Quantum States ◽  
Equilibrium Geometry ◽  
Two Dimensional ◽  
Triatomic Molecule ◽  
Small Energy ◽  
Long Range Interactions ◽  
Dissociation Threshold

The influence of the long range forces between an atom and a diatomic fragment on the density of vibrational bound states is studied theoretically in the vicinity of the dissociation threshold of a model triatomic molecule. In the two-dimensional case (2D), where the non dissociating bond is frozen at the equilibrium geometry, the number of quantum states and their density is shown to increase quickly in a small energy interval close to the dissociation threshold

scholarly journals Entanglement gap, corners, and symmetry breaking

2021 ◽  
Vol 10 (3) ◽  
Author(s):  
Vincenzo Alba
Keyword(s):  
Symmetry Breaking ◽  
Critical Point ◽  
Magnetic Order ◽  
Finite Size ◽  
Spherical Model ◽  
Low Energy ◽  
Two Dimensional ◽  
Finite Size Scaling ◽  
Size Scaling ◽  
Energy Part

We investigate the finite-size scaling of the lowest entanglement gap \delta\xiδξ in the ordered phase of the two-dimensional quantum spherical model (QSM). The entanglement gap decays as \delta\xi=\Omega/\sqrt{L\ln(L)}δξ=Ω/Lln(L). This is in contrast with the purely logarithmic behaviour as \delta\xi=\pi^2/\ln(L)δξ=π2/ln(L) at the critical point. The faster decay in the ordered phase reflects the presence of magnetic order. We analytically determine the constant \OmegaΩ, which depends on the low-energy part of the model dispersion and on the geometry of the bipartition. In particular, we are able to compute the corner contribution to \OmegaΩ, at least for the case of a square corner.

scholarly journals Implementation of Peraturan No. 1 Tahun 2015 on Management and Public Information Service in Binjai General KPU

2019 ◽  
Vol 11 (1) ◽  
pp. 10-20
Author(s):  
Fatimah Hanim ◽  
Evi Yunita Kurniaty
Keyword(s):  
Human Resources ◽  
Information Service ◽  
Public Information ◽  
Numerical Data ◽  
Active Role ◽  
Qualitative Description ◽  
Commission Regulation ◽  
Election Commission ◽  
Rule Out

The problems raised in this study are: (1) Lack of human resources to fill the structure so that concurrent positions occur in the work system in Binjai City KPU, (2) Lack of facilities and infrastructure in Binjai City KPU, (3) Still lack of socialization in Implementation Election Commission Regulation Number 1 of 2015. This study uses qualitative research methods, which are used in a study to obtain a qualitative description and will be dominated by many words, sentences and descriptions and rarely use numerical data, although it does not rule out the possibility of displaying tables or graphs to support the completeness of the data. From the results of the study, it is known that the existence of Regulation of the General Election Commission No. 1 of 2015 has a significant impact on improvements in public services, namely services that are getting better in "one door" by PPID, openness to access to public information, increasing active role of society, equality of treatment , timeliness, ease and affordability. Although there is still much to be improved in implementing the 2015 KPU Regulation No. 1.

scholarly journals The role of electron-electron interactions in two-dimensional Dirac fermions

Science ◽  
2018 ◽  
Vol 361 (6402) ◽  
pp. 570-574 ◽  
Author(s):  
Ho-Kin Tang ◽  
J. N. Leaw ◽  
J. N. B. Rodrigues ◽  
I. F. Herbut ◽  
P. Sengupta ◽  
...  
Keyword(s):  
Dirac Fermions ◽  
Two Dimensional ◽  
Electron Interactions

The partial realization theory of finite size two-dimensional arrays

1981 ◽  
Vol 64 (10) ◽  
pp. 1-8
Author(s):  
Tsuyoshi Matsuo ◽  
Yasumichi Hasegawa ◽  
Yoshikuni Okada
Keyword(s):  
Finite Size ◽  
Two Dimensional ◽  
Realization Theory

Receptions of the Past: Commemoration, Racism, Desire

Somatechnics ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 288-303
Author(s):  
Michael Connors Jackman
Keyword(s):  
Critical Point ◽  
Social Relations ◽  
White Privilege ◽  
Body Politic ◽  
The Body ◽  
Race And Racism ◽  
Lesbian And Gay ◽  
The Past ◽  
History Of

This article investigates the ways in which the work of The Body Politic (TBP), the first major lesbian and gay newspaper in Canada, comes to be commemorated in queer publics and how it figures in the memories of those who were involved in producing the paper. In revisiting a critical point in the history of TBP from 1985 when controversy erupted over race and racism within the editorial collective, this discussion considers the role of memory in the reproduction of whiteness and in the rupture of standard narratives about the past. As the controversy continues to haunt contemporary queer activism in Canada, the productive work of memory must be considered an essential aspect of how, when and for what reasons the work of TBP comes to be commemorated. By revisiting the events of 1985 and by sifting through interviews with individuals who contributed to the work of TBP, this article complicates the narrative of TBP as a bluntly racist endeavour whilst questioning the white privilege and racially-charged demands that undergird its commemoration. The work of producing and preserving queer history is a vital means of challenging the intentional and strategic erasure of queer existence, but those who engage in such efforts must remain attentive to the unequal terrain of social relations within which remembering forms its objects.

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