Reaction diffusion with initially separated reactants: Functional integral approach

1997 ◽  
Vol 56 (1) ◽  
pp. 708-711 ◽  
Author(s):  
Victor Malyutin ◽  
Savely Rabinovich ◽  
Shlomo Havlin
Keyword(s):  
Reaction Diffusion ◽  
Functional Integral ◽  
Integral Approach

scholarly journals Some comments on infinities on quantum field theory: A functional integral approach

2016 ◽  
Vol 24 (2) ◽  
Author(s):  
Luiz C. L. Botelho
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Function Space ◽  
Functional Integral ◽  
Field Theories ◽  
Integral Approach ◽  
Quantum Field ◽  
Functional Integrals ◽  
Euclidean Field ◽  
The Subject

AbstractWe analyze on the formalism of probabilities measures-functional integrals on function space the problem of infinities on Euclidean field theories. We also clarify and generalize our previous published studies on the subject.

Functional integral approach for a doubly degenerate Hubbard model

1979 ◽  
Vol 94 (2) ◽  
pp. 437-450 ◽  
Author(s):  
A. Richter ◽  
G. Röpke ◽  
F. Goedsche
Keyword(s):  
Hubbard Model ◽  
Functional Integral ◽  
Integral Approach

scholarly journals WORLDSHEET COVARIANT PATH INTEGRAL QUANTIZATION OF STRINGS

2006 ◽  
Vol 21 (32) ◽  
pp. 6525-6574 ◽  
Author(s):  
ANDRÉ VAN TONDER
Keyword(s):  
Path Integral ◽  
First Principles ◽  
Critical Dimension ◽  
Functional Integral ◽  
Integral Approach ◽  
Vertex Operators ◽  
General Covariance ◽  
Classical Transformation ◽  
Definition Of ◽  
Independent Path

We discuss a covariant functional integral approach to the quantization of the bosonic string. In contrast to approaches relying on noncovariant operator regularizations, interesting operators here are true tensor objects with classical transformation laws, even on target spaces where the theory has a Weyl anomaly. Since no implicit noncovariant gauge choices are involved in the definition of the operators, the anomaly is clearly separated from the issue of operator renormalization and can be understood in isolation, instead of infecting the latter as in other approaches. Our method is of wider applicability to covariant theories that are not Weyl invariant, but where covariant tensor operators are desired. After constructing covariantly regularized vertex operators, we define a class of background-independent path integral measures suitable for string quantization. We show how gauge invariance of the path integral implies the usual physical state conditions in a very conceptually clean way. We then discuss the construction of the BRST action from first principles, obtaining some interesting caveats relating to its general covariance. In our approach, the expected BRST related anomalies are encoded somewhat differently from other approaches. We conclude with an unusual but amusing derivation of the value D = 26 of the critical dimension.

Functional integral approach for diffusion in a random media

1990 ◽  
Vol 23 (10) ◽  
pp. 1829-1832 ◽  
Author(s):  
L C L Botelho ◽  
E de Pinho da Silva
Keyword(s):  
Random Media ◽  
Functional Integral ◽  
Integral Approach

scholarly journals Crossover from BCS to Bose superconductivity: A functional integral approach

1994 ◽  
Vol 194-196 ◽  
pp. 1409-1410 ◽  
Author(s):  
Mohit Randeria ◽  
C.A.R. Sáde Melo ◽  
Jan R. Engelbrecht
Keyword(s):  
Functional Integral ◽  
Integral Approach
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