Probing AdS Wormholes by Entanglement Entropy

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In this paper, we study the Lorentzian AdS wormhole solutions constructed in arXiv:0808.2481 [hep-th].

• Each of them is a classical solution interpolating between an AdS space and a flat space in type IIB supergravity.
• We calculate the holographic entanglement entropy to probe this geometry.
• Our analysis shows that there exits a mass gap in its holographic dual gauge theory and that the entanglement between the two boundaries is rather suppressed than that we naively expect for wormholes.