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Volumn 67, Issue 2, 2003, Pages

Shear viscosity of hot scalar field theory in the real-time formalism

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; CALCULATION; MATHEMATICAL ANALYSIS; MOLECULAR INTERACTION; NONLINEAR SYSTEM; THEORY; VISCOSITY;

EID: 0037438176     PISSN: 15507998     EISSN: 15502368     Source Type: Journal    
DOI: 10.1103/PhysRevD.67.025022     Document Type: Article
Times cited : (28)

References (32)
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    • D.N. Zubarev, Nonequilibrium Statistical Thermodynamics (Plenum, New York, 1974).
  • 2
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    • A. Hosoya, M.-A. Sakagami, and M. Takao, Ann. Phys. (N.Y.) 154, 229 (1984)
    • A. Hosoya, M.-A. Sakagami, and M. Takao, Ann. Phys. (N.Y.) 154, 229 (1984).
  • 7
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    • M.E. Carrington, Hou Defu, and R. Kobes, Phys. Rev. D 62, 025010 (2000)
    • M.E. Carrington, Hou Defu, and R. Kobes, Phys. Rev. D 62, 025010 (2000).
  • 13
    • 33646878355 scopus 로고    scopus 로고
    • K.-C. Chou, Z.-B. Su, B.-L. Hao, and L. Yu, Phys. Rep. 118, 1 (1985)
    • K.-C. Chou, Z.-B. Su, B.-L. Hao, and L. Yu, Phys. Rep. 118, 1 (1985).
  • 15
    • 4243434900 scopus 로고    scopus 로고
    • M.E. Carrington, Hou Defu, and J.C. Sowiak, Phys. Rev. D 62, 065003 (2000)
    • M.E. Carrington, Hou Defu, and J.C. Sowiak, Phys. Rev. D 62, 065003 (2000).
  • 18
    • 85038330737 scopus 로고    scopus 로고
    • This pinch singularity is physical and reflects the absence of collisions (infinite time between scatterings) in the noninteracting theory. In kinetic theory within the relaxation time approximation, infinite scattering time means infinite relaxation time and therefore infinite viscosity 1. To obtain a finite viscosity, scattering processes must be taken into account. These give the plasma particles a non-zero collisional width which shifts the poles of the single particle propagator away from the real axis, thereby regulating the pinch singularity and rendering the limits of zero momentum and energy in Eqs. (2) and (12) well defined and independent of the order in which they are taken. Following Jeon 35 we account for this need for a finite collisional width by organizing the calculation in terms of skeleton diagrams involving full propagators. Extracting the leading order contribution to the viscosity then amounts to specifying for each line in the skeleton diagram individually the required accuracy for the single particle self-energy in powers of the coupling constant
    • This pinch singularity is physical and reflects the absence of collisions (infinite time between scatterings) in the noninteracting theory. In kinetic theory within the relaxation time approximation, infinite scattering time means infinite relaxation time and therefore infinite viscosity 1. To obtain a finite viscosity, scattering processes must be taken into account. These give the plasma particles a non-zero collisional width which shifts the poles of the single particle propagator away from the real axis, thereby regulating the pinch singularity and rendering the limits of zero momentum and energy in Eqs. (2) and (12) well defined and independent of the order in which they are taken. Following Jeon 35 we account for this need for a finite collisional width by organizing the calculation in terms of skeleton diagrams involving full propagators. Extracting the leading order contribution to the viscosity then amounts to specifying for each line in the skeleton diagram individually the required accuracy for the single particle self-energy in powers of the coupling constant.
  • 21
    • 85038271368 scopus 로고    scopus 로고
    • hep-ph/0105313
    • F. Guerin, hep-ph/0105313;
    • Guerin, F.1
  • 31
    • 85038305319 scopus 로고    scopus 로고
    • J.M. Martinez Resco (private communication)
    • J.M. Martinez Resco (private communication);


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.