Remarks on the rolling tachyon BCFT

Gaberdiel, Matthias R.; Gutperle, Michael

doi:10.1088/1126-6708/2005/02/051

Cited by 11 publications

(16 citation statements)

References 30 publications

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“…thought there exist recent predictions for some of its structure constants [67] (see also [69,68,70] for related studies).…”

Section: Extended (Fzzt) Branes In Liouville Theorymentioning

confidence: 99%

Non-compact string backgrounds and non-rational CFT

Schomerus

2006

Physics Reports

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This is an introduction to the microscopic techniques of non-rational bulk and boundary conformal field theory which are needed to describe strings moving in non-compact curved backgrounds. The latter arise e.g. in the context of AdS/CFTlike dualities and for studies of time-dependent processes. After a general outline of the central concepts, we focus on two specific but rather prototypical models: Liouville field theory and the 2D cigar. Rather than following the historical path, the presentation attempts to be systematic and self-contained.

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“…thought there exist recent predictions for some of its structure constants [67] (see also [69,68,70] for related studies).…”

Section: Extended (Fzzt) Branes In Liouville Theorymentioning

confidence: 99%

Non-compact string backgrounds and non-rational CFT

Schomerus

2006

Physics Reports

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“…The latter is therefore the correct description of NS5-brane "throat geometry" in the supergravity approximation. 12 For related discussions on this point, see [46,47,48,49].…”

Section: Electrified D-brane Rolling In "Throat Geometry"mentioning

confidence: 99%

Rolling Down the Throat in NS5-brane Background: The Case of Electrified D-Brane

Nakayama

Panigrahi

Rey

et al. 2005

J. High Energy Phys.

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We study rolling radion dynamics of electrified D-brane in NS5-brane background, both in effective field theory and in full open string theory. We construct exact boundary states and, from them, extract conserved Noether currents. We argue that T-duality and Lorentz boost offer an intuitive approach. In the limit of large number of NS5-branes, both boundary wave functions and conserved currents are sharply peaked and agree with those deduced from the effective field theory. As the number of NS5-branes is reduced, width around the peak becomes wider by string corrections. We also study radiative decay process. By applying Lorentz covariance, we show how the decay of electrified D-brane is related to that of bare D-brane. We compute spectral moments of final state energy and winding quantum number. Using Lorentz covariance argument, we explain in elementary way why winding quantum number should be included and derive rules how to do so. We conclude that Kutasov's "geometric realization" between radion rolling dynamics and tachyon rolling dynamics holds universally, both for bare and electrified D-branes.

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“…The boundary state for the 1 2 S-brane is a simple generalization of the full S-brane case where the rotation matrix is now an element of SL(2, C). The explicit form is (with λ = 2πλ) [42]:…”

Section: Rolling Tachyon Boundary Conformal Field Theorymentioning

confidence: 99%

“…Another important issue that we encounter while going to a 1-loop analysis of tachyon condensation is that it is ambiguous where we should perform the inverse Wick rotation to go back to a Lorentzian signature. As was pointed out recently [42,46], since terms like (3.3) are ill-defined, there must be some physical prescription to define them. After we inverse Wick rotate to the Lorentzian frame, this could be given by the condition of conformal invariance of the boundary state:…”

Section: Rolling Tachyon Boundary Conformal Field Theorymentioning

confidence: 99%

On the production of open strings from brane anti-brane annihilation

Leblond

2006

J. High Energy Phys.

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We investigate the leading contribution to open string production in the time dependent background of the Brane Anti-Brane. This is a 1-loop diagram and we use Boundary Conformal Field Theory (BCFT) techniques to study it. We show that the amplitude to a single open string naïvely diverges when one looks at it as an expansion in oscillator levels. Nevertheless, we show that once we sum over all oscillator levels we get a finite result. We also clarify where to perform the inverse Wick rotation in this kind of problems. This calculation could have important consequences for the theory of reheating in brane inflationary models.

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Remarks on the rolling tachyon BCFT

Cited by 11 publications

References 30 publications

Non-compact string backgrounds and non-rational CFT

Non-compact string backgrounds and non-rational CFT

Rolling Down the Throat in NS5-brane Background: The Case of Electrified D-Brane

On the production of open strings from brane anti-brane annihilation

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