Programmable Architecture Research Of Quantum Computing

Quantum computers could outperform their classical counterparts when solving many fundamental and complex problems such as integer factorization, database search, global optimization and so on. These problems are solved by using various quantum algorithms, which often require many differenet quantum gates and a large number of qubits to obtain results. Therefore, in this paper, we study on an scalable array architecture that can be appropriately programmed to realize universal quantum computing. However, it was shown that in a pure quantum computer no such fixed quantum gate array architecture can be realized in a deterministic fashion. Because there are too many quantum gates to be programmed. However, a quantum unitary transfomation can be aided by a classic control computer. Inspired by this concept, we present a programmable architecture called "quantum FPGA" (QFPGA) similar to classical FPGAs in the area of traditional digital circuits.The proposed architecture is a hybrid quantum computation model combining the advantages of the qubus system and MBQC. In detail, QFPGA consists of two parts: The first part is the "quantum logic block" (QLB) to implement a general 2-qubit quantum gate; the second part is "quantum routing channels" (QRC), which is used as quantum routing resources and to realize diagonal unitary operators. By mapping a general quantum gate and several quantum algorithms to QFPGA, it shows that the architecture consisting of QLBs and QRCs is universal. By using qubus to design an optimal scheme for dynamic cluster-state generation, we show that our architecture is feasible as the error probability e is below 10-2, which is an accepted threshold of the MBQC.The last section of our paper is to realize Boolean function using photons. Implementing Boolean function on a quantum computer is very important for the exploration of quantum systems. Although it is impossible to build a pure programmable quantum gate array for quantum computing, it is feasible for classical Boolean functions. We propose a modularized method to realize CNOT, Toffoli and ETOF gates based on photons, by using these gates any Boolean function can be realized on our quantum gate array.