Open strings on D-branes from ABJM

TL;DR

This paper investigates open strings attached to D-branes in the ABJM/$AdS_4 imes ext{CP}^3$ background, revealing that their energy spectrum resembles that of closed strings and introducing a Hamiltonian description similar to the $AdS_5$ case.

Contribution

It extends the Hamiltonian framework for open strings to the ABJM/$AdS_4 imes ext{CP}^3$ setting, showing spectral similarities with closed strings and avoiding BMN scaling.

Findings

Open string energy spectrum matches closed string form.

Spectrum depends nontrivially on the coupling.

Hamiltonian description parallels the $AdS_5$ case.

Abstract

We study open strings on giant gravitons (D-branes on cycles) in the ABJM/$AdS_4\times \mathbb{CP}^3$ correspondence. We find that their energy spectrum has the same form as the one for closed strings, with a nontrivial function of the coupling, avoiding BMN scaling. A similar, Cuntz oscillator, Hamiltonian description for the string (operators at strong coupling) to the $AdS_5$ case is valid also in this case.