Sharif Digital Repository

One of the most popular topics in quantum information is the transfer of quantum states by the evolution of spin chains. To transfer quantum information one must transfer an arbitrary quantum state from one point to another in a spin network. The common idea for this is to use the coupling strengths of adjacent spins and apply a specific local magnetic field to the spin chains. In many of these chains, the state transfer is not done complete and the fidelity between the final state and the initial state is less than one. Recently, chains with a special Hamiltonian have been designed by which a desired state can be placed on one side of the chain and after a specific time, the state can be...