arXiv subjects
Publications and source records attributed to Oswaldo Zapata.
These notes provide an introduction to standard topics on quantum computation and communication for those who already have a basic knowledge of quantum mechanics. The main target audience are professional physicists as well as advanced students of physics; however, engineers and computer scientists may also benefit from them.
Despite the lack of experimental confirmation and of unambiguous theoretical proof, superstring theory has long been considered by many the only consistent quantized theory of gravity and the unique viable framework for the unification of all fundamental forces of nature. In the first part of this essay I explore the type of reasoning used to support such statements. In order to illustrate the argument, in the second part I focus on one of the most acclaimed achievements of the theory: the AdS/CFT correspondence. Finally, I conclude by observing that what constitutes a result in superstring theory involves more than purely theoretical arguments. Specifically, the acceptance of facts in superstring theory is inextricably linked to the large group of people that make it possible, whether they are string practitioners or not.
These notes on string theory are based on a series of talks I gave during my graduate studies. As the talks, this introductory essay is intended for young students and non-string theory physicists.
In this thesis we give explicit results for bosonic string amplitudes on AdS_3 x S^3 and the corresponding plane-wave limit. We also analyze the consequences of our approach for understanding holography in this set up, as well as its possible generalization to other models.
We briefly review the AdS3/CFT2 correspondence and the holographic issues that arise in the Penrose limit. Exploiting current algebra techniques, developped by D'Appollonio and Kiritsis for the closely related Nappi-Witten model, we obtain preliminary results for bosonic string amplitudes in the resulting Hpp-wave background and comment on how to extend them to the superstring.