The Emergence of Spacetime, or, Quantum Gravity on Your Desktop Export

@misc{citeulike:1867286, abstract = {Is there an approach to quantum gravity which is conceptually simple, relies on very few fundamental physical principles and ingredients, emphasizes geometric (as opposed to algebraic) properties, comes with a definite numerical approximation scheme, and produces robust results, which go beyond showing mere internal consistency of the formalism? The answer is a resounding yes: it is the attempt to construct a nonperturbative theory of quantum gravity, valid on all scales, with the technique of so-called Causal Dynamical Triangulations. Despite its conceptual simplicity, the results obtained up to now are far from trivial. Most remarkable at this stage is perhaps the fully dynamical emergence of a classical background (and solution to the Einstein equations) from a nonperturbative sum over geometries, without putting in any preferred geometric background at the outset. In addition, there is concrete evidence for the presence of a fractal spacetime foam on Planckian distance scales. The availability of a computational framework provides built-in reality checks of the approach, whose importance can hardly be overestimated.}, archivePrefix = {arXiv}, author = {Loll, R.}, citeulike-article-id = {1867286}, citeulike-linkout-0 = {http://arxiv.org/abs/0711.0273}, citeulike-linkout-1 = {http://arxiv.org/pdf/0711.0273}, day = {2}, eprint = {0711.0273}, keywords = {causal-networks, physics, quantum, quantum-gravity}, month = {Nov}, posted-at = {2007-11-07 05:47:56}, priority = {2}, title = {The Emergence of Spacetime, or, Quantum Gravity on Your Desktop}, url = {http://arxiv.org/abs/0711.0273}, year = {2007} }

TY - ELEC ID - citeulike:1867286 L3 - citeulike-article-id:1867286 N2 - Is there an approach to quantum gravity which is conceptually simple, relies on very few fundamental physical principles and ingredients, emphasizes geometric (as opposed to algebraic) properties, comes with a definite numerical approximation scheme, and produces robust results, which go beyond showing mere internal consistency of the formalism? The answer is a resounding yes: it is the attempt to construct a nonperturbative theory of quantum gravity, valid on all scales, with the technique of so-called Causal Dynamical Triangulations. Despite its conceptual simplicity, the results obtained up to now are far from trivial. Most remarkable at this stage is perhaps the fully dynamical emergence of a classical background (and solution to the Einstein equations) from a nonperturbative sum over geometries, without putting in any preferred geometric background at the outset. In addition, there is concrete evidence for the presence of a fractal spacetime foam on Planckian distance scales. The availability of a computational framework provides built-in reality checks of the approach, whose importance can hardly be overestimated. TI - The Emergence of Spacetime, or, Quantum Gravity on Your Desktop KW - causal-networks KW - physics KW - quantum KW - quantum-gravity AU - Loll, R PY - 2007/Nov/02/ UR - http://arxiv.org/abs/0711.0273 ER -