Sharif Digital Repository

Since the inception of the fields of quantum information and computation, the task of coherently transferring quantum states, through long and short distances has been of utmost importance. While photons are the ideal carriers of quantum information over long distances, it has become evident that the best possible method for transferring quantum information over short distances, i.e. through regular arrays of qubits, is to exploit the natural dynamics of the many body system. This idea was first introduced in the work of Bose [2] who showed that the natural dynamics of a Heisenberg ferromagnetic chain can achieve high-fidelity transfer of spin states over distances as long as 80 lattice... 

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... 

One of the main aspects of resource theory is finding conditions that one state can map to another state with “allowed” operations. In quantum, allowed operations are a subset of quantum channels. In quantum thermodynamics, for example, one usually asks whether a state σ can be generated from an initial state ρ via a Gibbs-preserving channel which is a special case of [2]. In 1980 Alberti and Uhlmann [2]found a condition for the existence of a quantum channel that simultaneously transforms an input-pair of states into an output-pair. This problem is addressed in resource theory[1, 3], statistical comparison[4] and etc. Since then, this problem and its generalizations[8, 23, 22, 31, 7, 6]... 

In this thesis, we will examine quantum state and entanglement transfer. Quantum state and entanglement transfer are requirements for the development of quantum technology. Transferring the output state of a quantum processor to the next processor, which can be at an arbitrary distance from the first processor, is one of the direct applications of quantum state transfer. On the other hand, entanglement transmission is a necessary prerequisite for quantum protocols. For example, preparing the entangled pair in a laboratory and transferring one share of an entangled pair to another place in order to create entanglement between different points is essential for building quantum networks. Also,... 

Offering software in the form of web services has gained great popularity due to the evolution of cloud architectures. REpresentational State Transfer (REST) comprises a set of rules and practices that provide simple and comprehensible APIs, clear representational structures, and scalable services for use in web engineering. Due to the simplicity and scalability of the REST architecture, it has become increasingly popular among web-service developers. Among the architectures used in web service design (REST, WSDL, SOAP), REST is the most common; it has significantly changed how systems are developed based on web services. Model-Driven Development (MDD) can facilitate the construction of...