Results 251 to 260 of about 5,165 (285)

Characterizing Quantum-Dot Cellular Automata

2014
We undertake an in-depth numerical study of quantum-dot cellular automata (QCA), a beyond-CMOS computing paradigm which represents bits as bistable charge distributions in cells consisting of quantum dots. Using semi-realistic but material-independent mod- elling, we characterize the building blocks of QCA circuits in as detailed and unbiased a manner ...
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High-speed metallic quantum-dot cellular automata

2003 Third IEEE Conference on Nanotechnology, 2003. IEEE-NANO 2003., 2004
The computation approach known as quantum-dot cellular automata (QCA) is based on encoding binary information in the charge configuration of quantum-dot cells. This paradigm provides a possible route to transistor-less electronics at the nano-scale. QCA devices using single-electron switching in metal-dot cells have been fabricated. Here we examine the
null Mo Liu, C.S. Lent
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Kink-Solitons in Quantum-Dot Cellular Automata

Japanese Journal of Applied Physics, 2001
We examine the propagation of electric polarization in quantum-dot cellular automata (QCA) as a kink-soliton. We solve the time-dependent Schrödinger equation numerically by the Hartree approximation and also by the exact method. By the Hartree approximation, we find that the shape of the kink-soliton can be fitted very well to a function of ...
Satoshi Nakagawa, Mikio Eto, Kiyoshi Kawamura   +2 more
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Quantum Dot Cellular Automata (QDCA)

2016
For representation of binary information and performing computations on them, cells containing quantum dots at defined locations are used. Tunnel barriers separate the neighboring dots. Under the control of a back plane voltage , electrons can tunnel between dots. But intercell barriers strictly prevent tunneling of electrons across cells.
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Experimental demonstration of quantum-dot cellular automata

Semiconductor Science and Technology, 1998
We present the experimental demonstration of a basic cell of quantum-dot cellular automata (QCA), a transistorless computation paradigm which addresses the issues of device density and interconnection. The device presented is a six-dot quantum-dot cellular system consisting of a four-dot QCA cell and two electrometer dots.
G L Snider, A O Orlov, I Amlani, G H Bernstein, C S Lent, J L Merz, W Porod   +6 more
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Quantum-Dot Cellular Automata Design Guideline

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2006
Quantum-dot Cellular Automata (QCA) is attracting a lot of attentions due to its extremely small feature sizes and ultra low power consumption. Up to now several designs using QCA technology have been proposed. However, we found not all of the designs function properly. Further, no general design guidelines have been proposed so far.
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Clocked quantum-dot cellular automata shift register

Surface Science, 2003
Abstract The quantum-dot cellular automata (QCA) computational paradigm provides a means to achieve ultimately low limits of power dissipation by replacing binary coding in currents and voltages with single-electron switching within arrays of quantum dots (“cells”).
Alexei O. Orlov, Ravi Kummamuru, R. Ramasubramaniam, Craig S. Lent, Gary H. Bernstein, Gregory L. Snider   +5 more
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Environmental decoherence stabilizes quantum-dot cellular automata

Journal of Applied Physics, 2013
We consider the effects of interaction with the environment on decoherence in quantum-dot cellular automata (QCA). We model the environment as a Coulombically interacting random assembly of quantum double-dots. The time evolution of our model system + environment is unitary and maintains one coherent state.
Enrique P. Blair, Craig S. Lent
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Fabrication of Magnetic Quantum-Dot Cellular Automata

ECS Meeting Abstracts, 2006
Abstract not Available.
Alexandra Imre, Lili Ji, Gyorgy Csaba, Alexei Orlov, Gary H. Bernstein, Wolfgang Porod   +5 more
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Quantum-dot cellular automata serial decimal subtractors

Automatic Control and Computer Sciences, 2012
Two designs for quantum-dot cellular automata serial decimal subtractors are proposed for a nanocomputer. The 5-bit Johnson-Mobius code is used to encode decimal digits. The first design leverages the complement addition method, while the second design uses the direct subtraction method. The proposed subtractors are compared to the existing quantum-dot
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