scholarly journals DENSITY FIELD THEORY TO STUDY ASSOCIATION IN A YUKAWA FLUID. ROLE OF THE FLUCTUATIONS

2003 ◽  
Vol 6 (4) ◽  
pp. 693 ◽  
Author(s):  
di Caprio ◽  
Holovko ◽  
Badiali
Keyword(s):  
Field Theory ◽  
Density Field ◽  
Yukawa Fluid ◽  
Study Association

Density field theory for a fluid interacting with the Yukawa potential. Role of the ideal entropy

2003 ◽  
Vol 101 (21) ◽  
pp. 3197-3202 ◽  
Author(s):  
D. DI CAPRIO ◽  
J. STAFIEJ ◽  
J. P. BADIALI
Keyword(s):  
Field Theory ◽  
Potential Role ◽  
Yukawa Potential ◽  
Density Field ◽  
The Ideal

scholarly journals Celestial superamplitude in $$ \mathcal{N} $$ = 4 SYM theory

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Hongliang Jiang
Keyword(s):  
Field Theory ◽  
Conformal Field Theory ◽  
Scattering Amplitudes ◽  
Momentum Space ◽  
Ward Identity ◽  
Yang Mills ◽  
Conformal Field ◽  
New Perspective ◽  
Celestial Sphere

Abstract Celestial amplitude is a new reformulation of momentum space scattering amplitudes and offers a promising way for flat holography. In this paper, we study the celestial amplitudes in $$ \mathcal{N} $$ N = 4 Super-Yang-Mills (SYM) theory aiming at understanding the role of superconformal symmetry in celestial holography. We first construct the superconformal generators acting on the celestial superfield which assembles all the on-shell fields in the multiplet together in terms of celestial variables and Grassmann parameters. These generators satisfy the superconformal algebra of $$ \mathcal{N} $$ N = 4 SYM theory. We also compute the three-point and four-point celestial super-amplitudes explicitly. They can be identified as the conformal correlation functions of the celestial superfields living at the celestial sphere. We further study the soft and collinear limits which give rise to the super-Ward identity and super-OPE on the celestial sphere, respectively. Our results initiate a new perspective of understanding the well-studied $$ \mathcal{N} $$ N = 4 SYM amplitudes via 2D celestial conformal field theory.

scholarly journals Aspects of renormalization in finite-density field theory

2015 ◽  
Vol 91 (19) ◽  
Author(s):  
A. Liam Fitzpatrick ◽  
Gonzalo Torroba ◽  
Huajia Wang
Keyword(s):  
Field Theory ◽  
Density Field ◽  
Finite Density

scholarly journals Role of air–sea fluxes and ocean surface density in the production of deep waters in the eastern subpolar gyre of the North Atlantic

Ocean Science ◽  
2021 ◽  
Vol 17 (5) ◽  
pp. 1353-1365
Author(s):  
Tillys Petit ◽  
M. Susan Lozier ◽  
Simon A. Josey ◽  
Stuart A. Cunningham
Keyword(s):  
North Atlantic ◽  
Surface Density ◽  
Ocean Surface ◽  
Density Field ◽  
The North ◽  
Iceland Basin ◽  
Deep Waters ◽  
Water Formation ◽  
Dense Water Formation

Abstract. Wintertime convection in the North Atlantic Ocean is a key component of the global climate as it produces dense waters at high latitudes that flow equatorward as part of the Atlantic Meridional Overturning Circulation (AMOC). Recent work has highlighted the dominant role of the Irminger and Iceland basins in the production of North Atlantic Deep Water. Dense water formation in these basins is mainly explained by buoyancy forcing that transforms surface waters to the deep waters of the AMOC lower limb. Air–sea fluxes and the ocean surface density field are both key determinants of the buoyancy-driven transformation. We analyze these contributions to the transformation in order to better understand the connection between atmospheric forcing and the densification of surface water. More precisely, we study the impact of air–sea fluxes and the ocean surface density field on the transformation of subpolar mode water (SPMW) in the Iceland Basin, a water mass that “pre-conditions” dense water formation downstream. Analyses using 40 years of observations (1980–2019) reveal that the variance in SPMW transformation is mainly influenced by the variance in density at the ocean surface. This surface density is set by a combination of advection, wind-driven upwelling and surface fluxes. Our study shows that the latter explains ∼ 30 % of the variance in outcrop area as expressed by the surface area between the outcropped SPMW isopycnals. The key role of the surface density in SPMW transformation partly explains the unusually large SPMW transformation in winter 2014–2015 over the Iceland Basin.

scholarly journals Field theory approach in kinetic reaction: Role of random sources and sinks

2011 ◽  
Vol 169 (1) ◽  
pp. 1489-1498 ◽  
Author(s):  
M. Hnatich ◽  
J. Honkonen ◽  
T. Lučivjanský
Keyword(s):  
Field Theory ◽  
Theory Approach ◽  
Kinetic Reaction ◽  
Sources And Sinks

Michael Polanyi’s Understanding of Field Theory

2021 ◽  
Vol 47 (2) ◽  
pp. 34-45
Author(s):  
Walter B. Gulick ◽  
Keyword(s):  
Field Theory ◽  
Problem Solving ◽  
Personal Knowledge ◽  
Michael Polanyi

Michael Polanyi introduced the concept of fields in the last several pages of Personal Knowledge. In this essay I examine whether the last-minute addition of fields advances his explanation of anthropogenesis. Polanyi’s view of the role of fields in solving problems and discovery plus their place in ontogenesis and phylogenesis is examined and found not to be wholly satisfactory. Alternative explanations of the factors advancing discovery and problem solving are advanced.

scholarly journals Effect of weak disorder on the BCS–BEC crossover in a two-dimensional Fermi gas

2017 ◽  
Vol 31 (09) ◽  
pp. 1750066
Author(s):  
Ayan Khan ◽  
B. Tanatar
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Fermi Gas ◽  
Ultracold Fermi Gas ◽  
Condensate Fraction ◽  
Two Dimensional ◽  
Weak Disorder ◽  
Unique Nature

In this paper, we study the two-dimensional (2D) ultracold Fermi gas with weak impurity in the framework of mean-field theory where the impurity is introduced through Gaussian fluctuations. We have investigated the role of the impurity by studying the experimentally accessible quantities such as condensate fraction and equation of state of the ultracold systems. Our analysis reveals that at the crossover, the disorder enhances superfluidity, which we attribute to the unique nature of the unitary region and to the dimensional effect.

Being Face to Face

2009 ◽  
pp. 440-454 ◽  
Author(s):  
Mary Allan ◽  
David Thorns
Keyword(s):  
Field Theory ◽  
Video Conferencing ◽  
End Users ◽  
Alternative View ◽  
Technological Systems ◽  
Social Construct ◽  
Face To Face ◽  
Access Grid ◽  
New Framework

The chapter introduces the Bourdieuean habitus and field theory as a framework for an alternative way of investigating how perceptions of Media Rich Conferencing Technologies (MRCT) such as video conferencing, Access Grid and Telepresence systems affect approaches to their design, implementation and application, and the ways in which they are utilized by end users. The habitus and field theory is utilized to provide a break-way from prevalent models of analyzing technology uptake and innovation diffusion and provides a new framework for positioning the MRCT as a social construct operating within interrelating social, economic, environmental, and technological systems. This new positioning opens the way for an alternative view of the role of MRCT and facilitates new approaches to their design.

Role of molecular bend angle and biaxiality in the stabilization of the twist-bend nematic phase

Soft Matter ◽  
2020 ◽  
Vol 16 (18) ◽  
pp. 4350-4357 ◽  
Author(s):  
Wojciech Tomczyk ◽  
Lech Longa
Keyword(s):  
Field Theory ◽  
Nematic Phase ◽  
Mean Field Theory ◽  
Mean Field ◽  
Structural Features ◽  
Bend Angle ◽  
Nematic Phases

Within mean-field theory for V-shaped molecules, we have investigated how the alteration of a molecule's structural features influence the stabilization of modulated and non-modulated nematic phases.

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