scholarly journals A sigma-model approach to glassy dynamics

Pramana ◽  
2005 ◽  
Vol 64 (6) ◽  
pp. 1075-1085 ◽  
Author(s):  
Claudio Chamon ◽  
Leticia F. Cugliandolo
Keyword(s):  
Sigma Model ◽  
Glassy Dynamics ◽  
Model Approach

scholarly journals Generalized nonlinear sigma model approach to alternating spin chains and ladders

2000 ◽  
Vol 14 (1) ◽  
pp. 47-52 ◽  
Author(s):  
M. Bocquet ◽  
Th. Jolicoeur
Keyword(s):  
Sigma Model ◽  
Spin Chains ◽  
Nonlinear Sigma Model ◽  
Model Approach

Tree string generated corrections to Einstein gravity from the sigma model approach

1990 ◽  
Vol 22 (2) ◽  
pp. 193-202 ◽  
Author(s):  
S. V. Ketov
Keyword(s):  
Sigma Model ◽  
Einstein Gravity ◽  
Model Approach

scholarly journals Superfield Hamiltonian quantization in terms of quantum antibrackets

2016 ◽  
Vol 31 (11) ◽  
pp. 1650054 ◽  
Author(s):  
Igor A. Batalin ◽  
Peter M. Lavrov
Keyword(s):  
Sigma Model ◽  
Equal Footing ◽  
Gauge Fixing ◽  
Actual Use ◽  
New Feature ◽  
Hamiltonian Quantization ◽  
Model Approach

We develop a new version of the superfield Hamiltonian quantization. The main new feature is that the BRST-BFV charge and the gauge fixing Fermion are introduced on equal footing within the sigma model approach, which provides for the actual use of the quantum/derived antibrackets. We study in detail the generating equations for the quantum antibrackets and their primed counterparts. We discuss the finite quantum anticanonical transformations generated by the quantum antibracket.

SIGMA MODEL APPROACH TO STRING THEORY

1989 ◽  
Vol 04 (06) ◽  
pp. 1257-1318 ◽  
Author(s):  
A.A. TSEYTLIN
Keyword(s):  
String Theory ◽  
Sigma Model ◽  
Equations Of Motion ◽  
Tree Approximation ◽  
Massless Fields ◽  
Model Approach

A review of the σ-model approach to derivation of effective string equations of motion for the massless fields is presented. We limit our consideration to the case of the tree approximation in the closed Bose string theory.

scholarly journals Sigma model approach to string theory effective actions with tachyons

2001 ◽  
Vol 42 (7) ◽  
pp. 2854-2871 ◽  
Author(s):  
A. A. Tseytlin
Keyword(s):  
String Theory ◽  
Sigma Model ◽  
Model Approach

RENORMALIZATION GROUP FLOW AND OPEN STRING DYNAMICS

1988 ◽  
Vol 03 (18) ◽  
pp. 1797-1805 ◽  
Author(s):  
NAOHITO NAKAZAWA ◽  
KENJI SAKAI ◽  
JIRO SODA
Keyword(s):  
Renormalization Group ◽  
Sigma Model ◽  
Open String ◽  
Tree Level ◽  
Nonlinear Sigma Model ◽  
Renormalization Group Flow ◽  
Point Solution ◽  
Β Function ◽  
Group Flow ◽  
Model Approach

The renormalization group flow in the nonlinear sigma model approach is explicitly solved to the fourth order in the case of an open string propagating in the tachyon background. Using a regularization different from the original one used by Klebanov and Susskind (K-S), we show that its fixed point solution produces the tree-level 5-point tachyon amplitude. Furthermore we prove K-S’s conjecture, i.e., the equivalence between the vanishing β-function defined by our regularization and the equation of motion arising from the effective action, up to all orders.

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