Quantum computation has overcome major difficulties and has become a field of solid research. On the theoretical side, several models of quantum computation are already proposed like the quantum network model using a set of universal logic gates. Quantum error correction and fault tolerant quantum computation have been proved to be well established theoretically. On the experimental side, test-...

The novel 2xVDD NOT, NAND, and NOR logic gates have been designed and implemented in a nanoscale CMOS process with only 1xVDD devices. With the proposed dynamic source bias technique, the logic gates can be designed to have 2xVDD tolerant capability. Thus, the new 2xVDD logic gates can be operated under 2xVDD voltage environment without suffering the gate-oxide reliability issue.

A binary decoder is a combinational logic circuit that converts a binary integer value to an associated pattern of output bits. They are used in a wide variety of applications, including data de-multiplexing, seven segment displays, and memory address decoding. This paper demonstrates the reversible logic synthesis for the n-to-2 n decoder, where n is the number of data bits. The circuits are d...

We study how dynamical decoupling (DD) pulse sequences can improve the reliability of quantum computers. We prove upper bounds on the accuracy of DD-protected quantum gates and derive sufficient conditions for DD-protected gates to outperform unprotected gates. Under suitable conditions, fault-tolerant quantum circuits constructed from DD-protected gates can tolerate stronger noise and have a l...

Majority gates play an important role in defectand fault-tolerant circuit implementations for nanotechnologies due to their use in redundancy mechanisms such as TMR, CTMR etc. Therefore, providing reliable implementation of majority logic using some redundancy mechanism is extremely important. This problem was addressed by von Neumann in 1956, in the form of ”majority multiplexing” and since th...

Quantum error correction is the backbone of fault-tolerant quantum computation, a necessary requirement for any large scale quantum computer. The fault-tolerance threshold theorem has long been a target for experimental precision, allowing for the possibility of reducing logical error rates to arbitrarily low levels without excessive overhead. While there are many promising fault-tolerant archi...

Design paradigms of logic circuits with Quantum-dot Cellular Automata (QCA) have been extensively studied in the recent past. Unfortunately, due to the lack of mature fabrication support, QCA-based circuits often suffer from various types of manufacturing defects and variations, and therefore, are unreliable and error-prone. QCA-based Exclusive-OR (XOR) gates are frequently used in the construc...

One-way quantum computing is a promising candidate for fault-tolerant computing. Here, we propose new protocols to realize deterministic one-way CNOT gate and $X$-rotations on quantum-computing platforms. By applying delayed-choice scheme, overcome limit of most currently available computers, which are unable implement further operations measured qubits or conditioned measurement results from o...

328 0740-7475/05/$20.00 © 2005 IEEE Copublished by the IEEE CS and the IEEE CASS IEEE Design & Test of Computers THERE IS RENEWED INTEREST in using hardware redundancy to mask faulty behavior in nanoelectronic components. In this article, we go back to the early ideas of von Neumann and review the key concepts behind Ntuple modular redundancy (NMR), hardware multiplexing, and interwoven redunda...