Encoding and manipulation of quantum information by means of topological degrees of freedom provides a promising way to achieve natural fault tolerance that is built in at the physical level. We show that this topological approach to quantum information processing is a particular instance of the notion of computation in a noiseless quantum subsystem. The latter then provides the most general co...

We introduce a novel framework called “artificial physics”, which provides distributed control of large collections of agents. The agents react to artificial forces that are motivated by natural physical laws. This framework provides an effective mechanism for achieving self-assembly, fault-tolerance, and self-repair. Examples are shown for various regular geometric configurations of agents. A ...

We introduce a novel framework called \artiicial physics", which is used to provide distributed control of large collections of agents. The agents react to artii-cial forces that are motivated by natural physical laws. This framework provides an eeective mechanism for achieving self-assembly, fault-tolerance, and self-repair. Examples are shown for various regular geometric con-gurations of age...

Geometric phase has been proposed as one of the promising methodologies to perform fault tolerant quantum computations. However, since decoherence plays a crucial role in such studies, understanding of mixed state geometric phase has become important. While mixed state geometric phase was first introduced mathematically by Uhlmann, recently Sjöqvist et al. [Phys. Rev. Lett. 85(14), 2845 (2000)]...

Drought and heat stress have become the most prevailing problems for maize (Zea mays L.) crop production. Therefore, development of tolerance has an essential goal in a breeding programme. Hence, experiment was conducted at Punjab Agricultural University, Ludhiana, to identify tolerant DH lines during spring season, 2016 2017. A total 32 were evaluated under non-stress conditions. Five indices ...

When designing mechanical assemblies, assembly tolerance design is an important issue which must be seriously considered by designers. Assembly tolerances reflect functional requirements of assembling, which can be used to control assembling qualities and production costs. This paper proposes a new method for designing assembly tolerance networks of mechanical assemblies. The method establishes...

Post-anthesis drought stress is the most important problem affecting wheat production in dryland fields, specially in Mediterranean regions. The main objective of this research was to evaluate drought tolerance indices in dryland wheat genotypes under post-anthesis drought stress. The research was including two different experiments. In each experiment, twenty dryland bread wheat genotypes were...

We introduce a framework, called “physicomimetics,” that provides distributed control of large collections of mobile physical agents in sensor networks. The agents sense and react to virtual forces, which are motivated by natural physics laws. Thus, physicomimetics is founded upon solid scientific principles. Furthermore, this framework provides an effective basis for self-organization, fault-t...

This paper presents a detailed error analysis of geometric hashing in the domain of 2D object recogition. Earlier analysis has shown that these methods are likely to produce false positive hypotheses when one allows for uniform bounded sensor error and moderate amounts of extraneous clutter points. These false positives must be removed by a subsequent veri cation step. Later work has incorporat...

For any xed rational parameter t 1, a (tree) t{spanner of a graph G is a spanning subgraph (tree) T in G such that the distance between every pair of vertices in T is at most t times their distance in G. General t{spanners and their variants have multiple applications in the eld of communication networks, distributed systems, and network design. In this paper, we combine the two concepts of sim...