Quantum-dot cellular automata (QCA) is an emerging technology which has been claimed to be faster and smaller than the most traditional CMOS technology. Since its beginning, many advances have been made, as the introduction of basic devices and the insertion of more complex circuits, like adders. It is not straightforward to implement more complex adders using QCA. This paper proposes the logic...

We improve the number of T gates needed to perform an n-bit adder from 8n + O(1) [1, 6, 8] to 4n+O(1). We do so via a “temporary logical-AND” construction, which uses four T gates to store the logical-AND of two qubits into an ancilla and zero T gates to later erase the ancilla. Temporary logical-ANDs are a generally useful tool when optimizing T-counts. They can be applied to integer arithmeti...

Due to the expected increase of defects in circuits based on deep submicron technologies, reliability has become an important design criterion. Although different approaches have been developed to estimate reliability in digital circuits and some measuring concepts have been separately presented to reveal the quality of analog circuit reliability in the literature, there is a gap to estimate re...

Quantum-dot cellular automata (QCA) are a promising nanotechnology to implement digital circuits at the nanoscale. Devices based on QCA have the advantages of faster speed, lower power consumption, and greatly reduced sizes. In this paper, we are presented the circuits, which generate random numbers in QCA.  Random numbers have many uses in science, art, statistics, cryptography, gaming, gambli...

The problem of synthesis and optimisation logical reversible quantum circuits from functional descriptions represented as decision diagrams is considered. It one the key problems being solved with aim creating computing technology computers. A new method stepwise transformation initial specification to a circuit proposed, which provides for following project states: reduced ordered binary diagr...

Geometric quantum computation offers a practical strategy toward robust due to its inherent error tolerance. However, the rigorous geometric conditions lead complex and/or error-disturbed controls, especially for logical qubits that involve more physical qubits, whose tolerance is effective in principle, but their experimental demonstration still demanding. Thus, how best simplify needed contro...

Graphs provide natural and convenient representations of communication networks. Graph models and flow formulations have been extensively used in the study of a large number of issues relating to network analysis and design. Structural characteristics such as connectivity/fault survivability (a measure of robustness of networks when link or node failures occur) and diameter (a measure of delay ...

While the peripheral endocrine components of the stress-responsive systems are well known, the same cannot be said of the stress axis within the CNS itself. One relay point in brain is now clear the parvocellular subdivision of the paraventricular nucleus of the hypothalamus (mpPVN). Corticotropin releasing hormone (CRH) containing cells within this nucleus appears to be modulated by circuits r...

_ _ _ _ _ 41, N0. 5, May 2006, pp. 1100-1107. ( * ) Nonce: subleqw any dlsclalmeri the term Ofthls Ming-Dou Ker, Shih-Lun Chen, Chia-Shen Tsai; “A New Charge patent 1S eXIended 01‘ adjusted under 35 Pump Circuit Dealing With Gate-Oxide Reliability Issue in Low U.S.C. 154(b) by 15 days. Voltage Processes,” IEEE Journal of Solid-State Circuits, ISCAS 2004, pp. 1-321-1-324. 21 A l. N .: 11/614 750...