Tachyon Dynamics in Open String Theory

By Ashoke Sen. 2004

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In this review we describe our current understanding of the properties of open string tachyons on an unstable D-brane or brane–antibrane system in string theory. The various string theoretic methods used for this study include techniques of two-dimensional conformal field theory, open string field theory, boundary string field theory, noncommutative solitons, etc. We also describe various attempts to understand these results using field theoretic methods. These field theory models include toy models like singular potential models and p-adic string theory, as well as more realistic version of the tachyon effective action based on Dirac–Born–Infeld type action. Finally we study closed string background produced by the "decaying" unstable D-branes, both in the critical string theory and in the two-dimensional string theory, and describe the open string completeness conjecture that emerges out of this study. According to this conjecture the quantum dynamics of an unstable D-brane system is described by an int...

Subfields: Astronomy and Astrophysics, Mathematical Physics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/207c4a89178d7d4bb1b9621b9cc1af7c49892072

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Citations in the corpus

Analytic solution for tachyon condensation in open string field theory (2005, methodology): “For more references, we refer to the reviews [2, 3] and [27–30].”
D-brane Deconstructions in IIB Orientifolds (2008, background): “Under favorable conditions however (where “favorable” is determined by D-term/stability constraints), tachyonic open string modes T exist between the brane and the anti-brane systems, which can condense to form a new supersymmetric bound state [101] (reviewed in [102]).”
Chiral symmetry breaking as open string tachyon condensation (2007, background): “A review on open string tachyon physics can be found in [20].”
AdS bubbles, entropy and closed string tachyons (2006, background): “Naively, our physical intuition influenced by the present knowledge of the open string tachyon condensation [72] suggests the second possibility i.”
The tachyon at the end of the universe (2005, background): “Finally, analogously to the case of open string tachyons (for a review, see [31]), closed string tachyons may be a subject well-studied via closed string field theory; a candidate “nothing” state obtained from bosonic closed string bulk tachyon condensation was recently presented in [32].”
Effective holographic theories for low-temperature condensed matter systems (2010, methodology): “One is the technique of level truncation in string field theory, used in order to calculate the effective tachyon potential in tachyon condensation studies, [37].”
Holographic models for QCD in the Veneziano limit (2011, background): “In [48] it was remarked that as the flavor sector of gauge theories in string theory arises from D-brane-antibrane pairs, the bifundamental field T could be naturally be identified with the brane-antibrane tachyon field that had been studied profusely (around flat space) in string theory by Sen and ”
Analytic solutions for marginal deformations in open string field theory (2007, background): “It would be very interesting to calculate the pressure of our exact solution and check whether it tends to zero in the infinite future, as would be expected from Sen’s analysis of tachyon matter [24, 1].”
Branes, anti-branes and Brauer algebras in gauge-gravity duality (2007, background): “This should shed light on tachyon condensation (see [51, 52] for reviews) in AdS from the dual gauge theory point of view, in regimes not accessible to perturbative string theory.”