Bena, Iosif Tyukov, Alexander

We compute holographically the energy loss of a moving quark in various states of the D1-D5 CFT. In the dual bulk geometries, the quark is the end of a trailing string, and the profile of this string determines the drag force exerted by the medium on the quark. We find no drag force when the CFT state has no momentum, and a nontrivial force for any...

Bombini, Alessandro Fardelli, Giulia

We study holographic entanglement entropy and holographic complexity in a two-charge, $\frac{1}{4}$-BPS family of solutions of type IIB supergravity, controlled by one dimensionless parameter. All the geometries in this family are asymptotically AdS$_3 \times \mathbb{S}^3 \times \mathbb{T}^4$ and, varying the parameter that controls them, they inte...

ElKhattabi, S. Hachi, M. Fitri, A. Benjelloun, A. T. Benzakour, M. Mcharfi, M. Bouachrine, M.
Published in
Journal of Molecular Modeling

In this work, we carried out a theoretical study in which DFT and TD-DFT calculations of a series of six new organic dyes that incorporate N,N-alkylamine as an electron donor and a cyanoacrylic acid group as an electron acceptor and anchoring group were performed. In each dye, the donor and the acceptor were bridged by six different π-conjugated sp...

Bena, Iosif Heidmann, Pierre Monten, Ruben Warner, Nicholas P.

We develop a new hybrid WKB technique to compute boundary-to-boundary scalar Green functions in asymptotically-AdS backgrounds in which the scalar wave equation is separable and is explicitly solvable in the asymptotic region. We apply this technique to a family of six-dimensional $\frac{1}{8}$-BPS asymptotically AdS$_3\,\times\,$S$^3$ horizonless ...

Casals, Marc Fabbri, Alessandro Martínez, Cristián Zanelli, Jorge

We discuss the effect of quantum fields on classical background spacetimes which contain timelike singularities. We do so for the case that the background is a (2 + 1)-dimensional BTZ spacetime, whether corresponding to a rotating black hole (M > 0) or to a naked conical singularity (M

Brunswic, Léo

In a previous paper, we introduced the notion of flat spacetimes including BTZ singularities. In the present paper,we study the moduli space of such spacetimes. We show, generalizing previous results of Penner, that such a spacetime always admits a convex polyhedral Cauchy-surface. It implies a canonical identification between the moduli space of l...

Casals, Marc Fabbri, Alessandro Martínez, Cristián Zanelli, Jorge

We investigate semiclassical backreaction on a conical naked singularity space–time with a negative cosmological constant in (2+1) -dimensions. In particular, we calculate the renormalized quantum stress–energy tensor for a conformally coupled scalar field on such naked singularity space–time. We then obtain the backreacted metric via the semiclass...

Babichev, Eugeny Charmousis, Christos Lehébel, Antoine Moskalets, Tetiana

We find and study the properties of black hole solutions for a subclass of Horndeski theory including the cubic Galileon term. The theory under study has shift symmetry but not reflection symmetry for the scalar field. The Galileon is assumed to have linear time dependence characterized by a velocity parameter. We give analytic 3-dimensional soluti...

Kay, Bernard S. Ortíz, L.
Published in
General Relativity and Gravitation

We discuss the relationship between the bulk-boundary correspondence in Rehren’s algebraic holography (and in other ‘fixed-background’, QFT-based, approaches to holography) and in mainstream string-theoretic ‘Maldacena AdS/CFT’. Especially, we contrast the understanding of black-hole entropy from the point of view of QFT in curved spacetime—in the ...

Min, Junseon Moon, Hyojin Yang, Hyun Ji Shin, Hyun-Hee Hong, Sung You Kang, Sebyung

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