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175
Tachyon condensation in string field theory
 JHEP 0003 (2000) 002 [arXiv:hepth/9912249
"... It has been conjectured that at a stationary point of the tachyon potential for the Dbrane of bosonic string theory, the negative energy density exactly cancels the Dbrane tension. We evaluate this tachyon potential by offshell calculations in open string field theory. Surprisingly, the condensat ..."
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Cited by 221 (9 self)
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It has been conjectured that at a stationary point of the tachyon potential for the Dbrane of bosonic string theory, the negative energy density exactly cancels the Dbrane tension. We evaluate this tachyon potential by offshell calculations in open string field theory. Surprisingly, the condensation of the tachyon mode alone into the stationary point of its cubic potential is found to cancel about 70 % of the Dbrane tension. Keeping relevant scalars up to four mass levels above the tachyon, the energy density at the shifted stationary point cancels 99 % of the Dbrane tension.
Some exact results on tachyon condensation in string field theory
 JHEP
"... The study of open string tachyon condensation in string field theory can be drastically simplified by making an appropriate choice of coordinates on the space of string fields. We show that a very natural coordinate system is suggested by the connection between the worldsheet renormalization group a ..."
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Cited by 186 (8 self)
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The study of open string tachyon condensation in string field theory can be drastically simplified by making an appropriate choice of coordinates on the space of string fields. We show that a very natural coordinate system is suggested by the connection between the worldsheet renormalization group and spacetime physics. In this system only one field, the tachyon, condenses while all other fields have vanishing expectation values. These coordinates are also wellsuited to the study of Dbranes as solitons. We use them to show that the tension of the D25brane is cancelled by tachyon condensation and compute exactly the profiles and tensions of lower dimensional Dbranes. September
Universality of the Tachyon Potential
 J. High Energy Phys
, 1999
"... Using string field theory, we argue that the tachyon potential on a Dbrane antiDbrane system in type II string theory in arbitrary background has a universal form, independent of the boundary conformal field theory describing the brane. This implies that if at the minimum of the tachyon potential ..."
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Cited by 175 (8 self)
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Using string field theory, we argue that the tachyon potential on a Dbrane antiDbrane system in type II string theory in arbitrary background has a universal form, independent of the boundary conformal field theory describing the brane. This implies that if at the minimum of the tachyon potential the total energy of the brane antibrane system vanishes in a particular background, then it vanishes in any other background. Similar result holds for the tachyon potential of the nonBPS Dbranes of type II string theory, and the Dbranes of bosonic string theory. 1
A Review on Tachyon Condensation in Open String Field Theories
"... We review the recent studies of tachyon condensation in string field theory. After introducing the open string field theory both for bosonic string and for superstring, we use them to examine the conjecture that the unstable configurations of the Dbrane will decay into the ‘closed string vacuum ’ t ..."
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Cited by 140 (4 self)
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We review the recent studies of tachyon condensation in string field theory. After introducing the open string field theory both for bosonic string and for superstring, we use them to examine the conjecture that the unstable configurations of the Dbrane will decay into the ‘closed string vacuum ’ through the tachyon condensation. And we describe the attemps to construct a lower dimensional bosonic Dbrane as an unstable lump solution of the string field equation. We obtain exact results from another formulation, background independent open string field theory. We also discuss some other topics which are related to tachyon condensation in string theory, such as the construction of a Dbrane as a noncommutative soliton
Braneantibrane action from boundary string field theory
 JHEP
"... In this paper we give the boundary string theory description of braneantibrane systems. From the worldsheet action of braneantibrane systems we obtain the tachyon potential and discuss the tachyon condensation exactly. We also find the worldvolume action including the gauge fields. Moreover we d ..."
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Cited by 125 (17 self)
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In this paper we give the boundary string theory description of braneantibrane systems. From the worldsheet action of braneantibrane systems we obtain the tachyon potential and discuss the tachyon condensation exactly. We also find the worldvolume action including the gauge fields. Moreover we determine RRcouplings exactly for nonBPS branes and braneantibranes. These couplings are known as superconnections and correspond to K0 (M) and K1 (M) for the nonBPS branes and braneantibranes, respectively. We also show that Myers terms appear if we include the transverse scalars in the boundary sigma model action. 1
Closed strings from decaying Dbranes
"... We compute the emission of closed string radiation from homogeneous rolling tachyons. For an unstable decaying Dpbrane the radiated energy is infinite to leading order for p ≤ 2 and finite for p> 2. The closed string state produced by a decaying brane is closely related to the state produced by ..."
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Cited by 96 (2 self)
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We compute the emission of closed string radiation from homogeneous rolling tachyons. For an unstable decaying Dpbrane the radiated energy is infinite to leading order for p ≤ 2 and finite for p> 2. The closed string state produced by a decaying brane is closely related to the state produced by Dinstantons at a critical Euclidean distance from t = 0. In the case of a D0 brane one can cutoff this divergence so that we get a finite energy final state which would be the state that the brane decays into. March
DBranes as unstable lumps in bosonic open string field theory
 JHEP
, 2000
"... We construct Dpbranes in bosonic string theory as unstable lumps in a truncated string field theory of open strings on a D25brane. We find that the lowest level truncation gives good quantitative agreement with the predicted Dbrane tension and lowlying spectrum of the Dbrane for sufficiently la ..."
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Cited by 86 (3 self)
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We construct Dpbranes in bosonic string theory as unstable lumps in a truncated string field theory of open strings on a D25brane. We find that the lowest level truncation gives good quantitative agreement with the predicted Dbrane tension and lowlying spectrum of the Dbrane for sufficiently large p and study the effect of the next level corrections for p = 24. We show that a U(1) gauge field zero mode on the Dbrane arises through a mechanism reminiscent of the RandallSundrum mechanism for gravity. February
Tachyon effective actions in open string theory
 Nucl. Phys. B
"... We argue that the DiracBornInfeld (DBI) action coupled to a tachyon, that is known to reproduce some aspects of open string dynamics, can be obtained from open string theory in a certain limit, which generalizes the limit leading to the usual DBI action. This helps clarify which aspects of the ful ..."
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Cited by 77 (6 self)
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We argue that the DiracBornInfeld (DBI) action coupled to a tachyon, that is known to reproduce some aspects of open string dynamics, can be obtained from open string theory in a certain limit, which generalizes the limit leading to the usual DBI action. This helps clarify which aspects of the full open string theory are captured by this action. 4/03
Dbranes and strings as noncommutative solitons
 JHEP
, 2000
"... The noncommutative geometry of a large auxiliary Bfield simplifies the construction of Dbranes as solitons in open string field theory. Similarly, fundamental strings are constructed as localized flux tubes in the string field theory. Tensions are determined exactly using general properties of no ..."
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Cited by 68 (5 self)
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The noncommutative geometry of a large auxiliary Bfield simplifies the construction of Dbranes as solitons in open string field theory. Similarly, fundamental strings are constructed as localized flux tubes in the string field theory. Tensions are determined exactly using general properties of nonBPS branes, and the nonAbelian structure of gauge fields on coincident Dbranes is recovered. May
Fundamental strings in open string theory at the tachyonic vacuum,” hepth/0010240
"... We show that the worldvolume theory on a Dpbrane at the tachyonic vacuum has solitonic string solutions whose dynamics is governed by the NambuGoto action of a string moving in (25+1) dimensional spacetime. This provides strong evidence for the conjecture that at this vacuum the full (25+1) dim ..."
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Cited by 55 (4 self)
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We show that the worldvolume theory on a Dpbrane at the tachyonic vacuum has solitonic string solutions whose dynamics is governed by the NambuGoto action of a string moving in (25+1) dimensional spacetime. This provides strong evidence for the conjecture that at this vacuum the full (25+1) dimensional Poincare invariance is restored. We also use this result to argue that the open string field theory at the tachyonic vacuum must contain closed string excitations.