Results 241 to 250 of about 5,165 (285)

Quantum computing with quantum-dot cellular automata

Physical Review A, 2001
Quantum-dot cellular automata (QCA), arrays of coupled quantum-dot devices, are proposed for quantum computing. The notion of coherent QCA (CQCA) is introduced in order to distinguish QCA applied to quantum computing from classical digital QCA. Information is encoded in the spatial state of the electrons in the multidot system. A line of CQCA cells can
Géza Tóth, Craig S. Lent
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Quantum-dot cellular automata: computing by filed polarization

Proceedings 2003. Design Automation Conference (IEEE Cat. No.03CH37451), 2003
As CMOS technology continues its monotonic shrink, computing with quantum dots remains a goal in nanotechnology research. Quantum-dot cellular automata (QCA) is a paradigm for low-power, high-speed, highly dense computing that could be realized in a variety of materials systems.
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Quantum dot cellular automata magnitude comparators

2012 IEEE International Conference on Electron Devices and Solid State Circuit (EDSSC), 2012
In this paper, first a 1-bit magnitude comparator design is presented that reduces the number of QCA cells compared to previously reported design. The proposed design requires only about 49 % of the area as compared to previous design with the same speed and clocking performance. Then, we have proposed novel 2 and 3 bit comparator designs in QCA.
Bahniman Ghosh, Shoubhik Gupta, Smriti Kumari   +2 more
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Clocked molecular quantum-dot cellular automata

IEEE Transactions on Electron Devices, 2003
Quantum-dot cellular automata (QCA) is an approach to computing that eliminates the need for current switches by representing binary information as the configuration of charge among quantum dots. For molecular QCA, redox sites of molecules serve as the quantum dots.
C.S. Lent, B. Isaksen
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Implementations of Quantum-dot Cellular Automata

2006 International Conference on Nanoscience and Nanotechnology, 2006
An introduction to quantum-dot cellular automata (QCA) is presented along with experimental implementations. QCA is a transistorless nanoelectronic computation paradigm that addresses the issues of device and power density, which are becoming increasingly important in the electronics industry.
Gregory Snider, Alexei Orlov, Craig Lent, Gary Bernstein, Marya Lieberman, Thomas Fehlner   +5 more
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Thresholding using Quantum-dot Cellular Automata

2011 International Conference on Innovations in Information Technology, 2011
Quantum-dot Cellular Automata(QCA), a promising alternative to CMOS technology, can provide a powerful and efficient computing platform for image processing which has heavy computational requirements. Image thresholding is one such image processing technique that plays a significant role in applications of image segmentation for its intuitive ...
Bibhash Sen, Anshu S Anand, Tanumoy Adak, Biplab K Sikdar   +3 more
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Fanout in quantum dot cellular automata

63rd Device Research Conference Digest, 2005. DRC '05., 2005
In this report, we describe the fabrication and experimental demonstration of fanout in QCA. Fanout is important as it is necessary for complex digital logic circuits and is essential for generating compact designs, as multiple cells can be then driven by a single driver cell.
K.K. Yadavalli, A.O. Orlov, R.K. Kummamuru, C.S. Lent, G.H. Bernstein, G.L. Snider   +5 more
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Quantum-Dot Cellular Automata Serial Comparator

2008 11th EUROMICRO Conference on Digital System Design Architectures, Methods and Tools, 2008
The quantum-dot cellular automata (QCA) are one of the few alternative computing platforms that meet most of the criteria desired for computing platforms of the future. One of the basic concepts that has popularized the QCA platform to computer designers is adiabatic pipelining, which implicitly assures the correct data flow and in this view simplifies
Blaz Lampreht, Luka Stepancic, Igor Vizec, Bostjan Zankar, Miha Mraz, Iztok Lebar Bajec, Primoz Pecar   +6 more
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Digital Logic Gate Using Quantum-Dot Cellular Automata

Science, 1999
A functioning logic gate based on quantum-dot cellular automata is presented, where digital data are encoded in the positions of only two electrons. The logic gate consists of a cell, composed of four dots connected in a ring by tunnel junctions, and two single-dot electrometers. The device is operated by applying inputs to the gates of the cell.
, Amlani, , Orlov, , Toth, , Bernstein, , Lent, , Snider   +5 more
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Restoring Divider Design for Quantum-Dot Cellular Automata

2011 11th IEEE International Conference on Nanotechnology, 2011
A digit recurrent restoring binary divider design for quantum-dot cellular automata (QCA) is presented in detail. It is a conventional design that uses controlled full subtractor cell units to produce a relatively simple and efficient implementation.
Seong-Wan Kim, Earl E. Swartzlander
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