Instanton effects in matrix models and string effective Lagrangians
نویسندگان
چکیده
منابع مشابه
The Strength of Non-perturbative Effects in Matrix Models and String Effective Lagrangians
We present a summary of the results of an explicit calculation of the strength of nonperturbative interactions in matrix models and string effective Lagrangians. These interactions are induced by single eigenvalue instantons in the d = 1 bosonic matrix model. A well defined approximation scheme is used to obtain induced operators whose exact form we exhibit. We briefly discuss the possibility t...
متن کاملString Loop Divergences and Effective Lagrangians
We isolate logarithmic divergences from bosonic string amplitudes on a disc. These divergences are compared with “tadpole” divergences in the effective field theory with a covariant cosmological term implied by the counting of string coupling constants. We find an inconsistency between the two. This is a serious problem which could undermine the ability to remove divergences from the bosonic st...
متن کاملString Perturbation Theory and Effective Lagrangians*
We isolate logarithmic divergences from bosonic string amplitudes on a disc. These divergences are compared with ‘tadpole’ divergences in the effective field u theory with a cosmological term, which also contains an effective potential for the dilaton. Also, corrections to p-functions are compared with variations of the effective action. In both cases we find an inconsistency between the two. T...
متن کاملNon-perturbative Effective Lagrangians for Super-matrix Models
We discuss d = 1,N = 2 supersymmetric matrix models and exhibit the associated d = 2 collective field theory in the limit of dense eigenvalues. From this field theory we construct, by the addition of several new fields, a d = 2 supersymmetric effective field theory, which reduces to the collective field theory when the new fields are replaced with their vacuum expectation values. This effective...
متن کاملEffective Lagrangians and chiral random matrix theory.
Recently, sum rules were derived for the inverse eigenvalues of the Dirac operator. They were obtained in two different ways: i) starting from the low-energy effective Lagrangian and ii) starting from a random matrix theory with the symmetries of the Dirac operator. This suggests that the effective theory can be obtained directly from the random matrix theory. Previously, this was shown for thr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1995
ISSN: 0550-3213
DOI: 10.1016/0550-3213(94)00387-t