ON BOSONIC STRING MODELS IN SEMICLASSICAL APPROXIMATION: THE DERIVATIVE OF THE FUNCTIONAL DETERMINANT OF THE TRANSVERSE FLUCTUATION OPERATOR

Under some restrictions we calculate the functional derivative of the determinant of an operator which is the main ingredient in the semiclassical approximation of the physical ground state of the closed bosonic string. We show that a formula for the determinant itself previously published by other authors is incorrect.

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STRING EQUATIONS OF MOTION FROM VANISHING CURVATURE

International Journal of Modern Physics A ◽

10.1142/s0217751x91000708 ◽

1991 ◽

Vol 06 (08) ◽

pp. 1319-1333 ◽

Cited By ~ 1

Author(s):

MARK J. BOWICK ◽

KONG-QING YANG

Keyword(s):

Vector Bundles ◽

Adiabatic Approximation ◽

Equations Of Motion ◽

Bosonic String ◽

Complex Structures ◽

Closed Bosonic String

The equations of motion for the massless modes of the closed bosonic string are obtained in the adiabatic approximation from the requirement of the vanishing of the curvature of appropriate vector bundles over the space of complex structures Diff S1/S1. This vanishing is required for physical states to be independent of string parametrization.

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Closed bosonic string field theory at quintic order II: marginal deformations and effective potential

Journal of High Energy Physics ◽

10.1088/1126-6708/2007/09/118 ◽

2007 ◽

Vol 2007 (09) ◽

pp. 118-118 ◽

Cited By ~ 10

Author(s):

Nicolas Moeller

Keyword(s):

Field Theory ◽

String Field Theory ◽

Effective Potential ◽

Bosonic String ◽

Marginal Deformations ◽

Closed Bosonic String

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STRING-LOOP CORRECTIONS TO EFFECTIVE ACTION AND BLACK HOLE INSTABILITIES

Modern Physics Letters A ◽

10.1142/s0217732395000612 ◽

1995 ◽

Vol 10 (07) ◽

pp. 575-585

Author(s):

V. V. BELOKUROV ◽

M. Z. IOFA

Keyword(s):

Black Hole ◽

String Theory ◽

Effective Action ◽

Black Hole Solution ◽

Bosonic String ◽

Superstring Theory ◽

Integration Measure ◽

String Loop ◽

Bosonic String Theory ◽

Closed Bosonic String

Following the ideas of Ref. 3, to account for instability of 2-D black hole solution, we discuss possible imaginary string-loop corrections to the coefficient at the Einstein term in string effective action (EA). In closed bosonic string theory, such corrections appear because of the tachyon contribution to the integration measure over the moduli. In superstring theory, several possible sources of complex one-string-loop contributions to the EA are considered. It is argued that none of them can account for complex corrections to the Einstein term in the effective action.

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