The spectrum of tachyons in AdS/CFT

Zoltan Bajnok*, Nadav Drukker, Arpad Hegedus, Rafael I. Nepomechie, Laszlo Palla, Christoph Sieg, Ryo Suzuki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

We analyze the spectrum of open strings stretched between a D-brane and an anti-D-brane in planar AdS/CFT using various tools. We focus on open strings ending on two giant gravitons with different orientation in AdS(5) x S-5 and study the spectrum of string excitations using the following approaches: open spin-chain, boundary asymptotic Bethe ansatz and boundary thermodynamic Bethe ansatz (BTBA). We find agreement between a perturbative high order diagrammatic calculation in N = 4 SYM. and the leading finite-size boundary Luscher correction. We study the ground state energy of the system at finite coupling by deriving and numerically solving a set of BTBA equations. While the numerics give reasonable results at small coupling, they break down at finite coupling when the total energy of the string gets close to zero, possibly indicating that the state turns tachyonic. The location of the breakdown is also predicted analytically.

Original languageEnglish
Article number55
Number of pages49
JournalJournal of High Energy Physics
Volume2014
Issue number3
DOIs
Publication statusPublished - 11 Mar 2014

Keywords

  • AdS-CFT Correspondence
  • Bethe Ansatz Tachyon Condensation
  • Boundary Quantum Field Theory
  • TBA EQUATIONS
  • Y-SYSTEM
  • MODEL
  • CONDENSATION
  • NUMBERS
  • BRANES
  • STATES
  • LOOPS

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