Publications

We investigate the holographic description of CFTs defined on the cylinder and on AdS, which include an operator saturating the unitarity bound. The standard Klein-Gordon field with the corresponding mass and boundary conditions on global AdS_(d+1) and on an AdS_(d+1) geometry with AdS_d conformal boundary contains ghosts. We identify a limit in which the singleton field theory is obtained from the bulk theory with standard renormalized inner ...

This article contains a proof of the MDS conjecture for k ? 2p ? 2. That is, that if S is a set of vectors of Fkq in which every subset of S of size k is a basis, where q = p h , p is prime and q is not and k ? 2p ? 2, then |S| ? q + 1. It also contains a short proof of the same fact for k ? p, for all q.

This article contains a proof of the MDS conjecture for k a parts per thousand currency sign 2p - 2. That is, that if S is a set of vectors of in which every subset of S of size k is a basis, where q = p (h) , p is prime and q is not and k a parts per thousand currency sign 2p - 2, then |S| a parts per thousand currency sign q + 1. It also contains a short proof of the same fact for k a parts per thousand currency sign p, for all q.

In this paper we extend the study of linear spaces of upper triangular matrices endowed with the flag-rank metric. Such metric spaces are isometric to certain spaces of degenerate flags and have been suggested as suitable framework for network coding. In this setting we provide a Singleton-like bound which relates the parameters of a flag-rank-metric code. This allows us to introduce the family of maximum flag-rank distance codes, that are ...

We study the quantum error correction properties of the black hole interior in a toy model for an evaporating black hole: Jackiw-Teitelboim gravity entangled with a non-gravitational bath. After the Page time, the black hole interior degrees of freedom in this system are encoded in the bath Hilbert space. We use the gravitational path integral to show that the interior density matrix is correctable against the action of quantum operations on the ...

The outage probability limit is a fundamental lower bound on the word error rate of coded communications systems. It is mainly determined by two parameters: the diversity order and the coding gain. With linear precoding, the maximum achievable coding rate yielding full-diversity can exceed the upper limit given by the standard Singleton bound. However, the effect of precoding on the coding gain is not well understood. This paper analyzes linear ...

Introduction:

Oocyte donation (OD) has become well established. As with any other reproductive techniques, assessment of possible associated obstetric and perinatal risk remains paramount. To evaluate the pure obstetrical and perinatal impact of conceiving through OD we compared an OD-group with a matched control group of autologeous oocytes (AO). Secondly, we evaluate differences in obstetrical and perinatal outcome between ...

Large discrepancies have been found in different countries when comparing real energy use in houses to the theoretical energy use calculated using energy performance of buildings (EPB) calculation methods. This prediction gap has become a major concern in the residential building sector, where the information provided on energy performance certificates is often the only energy related basis to support investment decisions in construction and ...

Molecular nanomagnets are based on transition metal ions, which determine their magnetic properties. Magnetic shielding of the molecules by organic ligands allows the quantum effects characteristic of a single molecule to be measured in a bulk sample. In view of possible applications, precise modeling of such materials plays a very important role. In the lecture we are going to present results on anisotropy, geometric structure and frustration ...