Kuantum haberleşmede öncelik ve depolama

Quantum Computation and Quantum Communication are emerging fi elds of science, in which principles of quantum mechanics are exploited to reach extraordinary results that may even seem counter-intuitive. However, the power of quantum computers are limited due to the fact that qubits cannot be stored or recalled as bits due to the no cloning theorem. In the rst part of this thesis we focus on the problem of qubit storage. First, we propose the essential requirements for a good qubit storage system, which are access delay complexity, circuit complexity, maximum connectivity and use of ancillary qubits. Later, we introduce diff erent possible qubit storage systems fi rst as building blocks and then for large systems and comment on the feasibility of constructing these systems. As another consequence of no cloning theorem, in quantum communications, a corrupt data cannot be retransmitted. Therefore, we may have to use corrupt data to its fullest. Moreover, since it is not yet possible to read and measure qubits as readily as bits, sometimes it may be necessary to evaluate which qubits should be handled first. In the second part of this thesis, in order to quantify the damage on a corrupt data and to prioritize our qubit reading, we propose a novel measure of bitwise information priority. We simulate our results in classical block codes in GF(2).