Clock Topologies for Molecular Quantum-Dot Cellular Automata
Quantum-dot cellular automata (QCA) is a low-power, non-von-Neumann, general-purpose paradigm for classical computing using transistor-free logic. Here, classical bits are encoded on the charge configuration of individual computing primitives known as “cells.” A cell is a system...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-09-01
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| Series: | Journal of Low Power Electronics and Applications |
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| Online Access: | http://www.mdpi.com/2079-9268/8/3/31 |
| _version_ | 1798005410254290944 |
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| author | Enrique Blair Craig Lent |
| author_facet | Enrique Blair Craig Lent |
| author_sort | Enrique Blair |
| collection | DOAJ |
| description | Quantum-dot cellular automata (QCA) is a low-power, non-von-Neumann, general-purpose paradigm for classical computing using transistor-free logic. Here, classical bits are encoded on the charge configuration of individual computing primitives known as “cells.” A cell is a system of quantum dots with a few mobile charges. Device switching occurs through quantum mechanical inter-dot charge tunneling, and devices are interconnected via the electrostatic field. QCA devices are implemented using arrays of QCA cells. A molecular implementation of QCA may support THz-scale clocking or better at room temperature. Molecular QCA may be clocked using an applied electric field, known as a clocking field. A time-varying clocking field may be established using an array of conductors. The clocking field determines the flow of data and calculations. Various arrangements of clocking conductors are laid out, and the resulting electric field is simulated. It is shown that that control of molecular QCA can enable feedback loops, memories, planar circuit crossings, and versatile circuit grids that support feedback and memory, as well as data flow in any of the ordinal grid directions. Logic, interconnect and memory now become indistinguishable, and the von Neumann bottleneck is avoided. |
| first_indexed | 2024-04-11T12:39:52Z |
| format | Article |
| id | doaj.art-846f462e15644751becdf36819faaf5d |
| institution | Directory Open Access Journal |
| issn | 2079-9268 |
| language | English |
| last_indexed | 2024-04-11T12:39:52Z |
| publishDate | 2018-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Low Power Electronics and Applications |
| spelling | doaj.art-846f462e15644751becdf36819faaf5d2022-12-22T04:23:32ZengMDPI AGJournal of Low Power Electronics and Applications2079-92682018-09-01833110.3390/jlpea8030031jlpea8030031Clock Topologies for Molecular Quantum-Dot Cellular AutomataEnrique Blair0Craig Lent1Department of Electrical and Computer Engineering, Baylor University, Waco, TX 76798, USADepartment of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556, USAQuantum-dot cellular automata (QCA) is a low-power, non-von-Neumann, general-purpose paradigm for classical computing using transistor-free logic. Here, classical bits are encoded on the charge configuration of individual computing primitives known as “cells.” A cell is a system of quantum dots with a few mobile charges. Device switching occurs through quantum mechanical inter-dot charge tunneling, and devices are interconnected via the electrostatic field. QCA devices are implemented using arrays of QCA cells. A molecular implementation of QCA may support THz-scale clocking or better at room temperature. Molecular QCA may be clocked using an applied electric field, known as a clocking field. A time-varying clocking field may be established using an array of conductors. The clocking field determines the flow of data and calculations. Various arrangements of clocking conductors are laid out, and the resulting electric field is simulated. It is shown that that control of molecular QCA can enable feedback loops, memories, planar circuit crossings, and versatile circuit grids that support feedback and memory, as well as data flow in any of the ordinal grid directions. Logic, interconnect and memory now become indistinguishable, and the von Neumann bottleneck is avoided.http://www.mdpi.com/2079-9268/8/3/31quantum-dot cellular automataclock designmemoryin-plane crossingcomputational grid |
| spellingShingle | Enrique Blair Craig Lent Clock Topologies for Molecular Quantum-Dot Cellular Automata Journal of Low Power Electronics and Applications quantum-dot cellular automata clock design memory in-plane crossing computational grid |
| title | Clock Topologies for Molecular Quantum-Dot Cellular Automata |
| title_full | Clock Topologies for Molecular Quantum-Dot Cellular Automata |
| title_fullStr | Clock Topologies for Molecular Quantum-Dot Cellular Automata |
| title_full_unstemmed | Clock Topologies for Molecular Quantum-Dot Cellular Automata |
| title_short | Clock Topologies for Molecular Quantum-Dot Cellular Automata |
| title_sort | clock topologies for molecular quantum dot cellular automata |
| topic | quantum-dot cellular automata clock design memory in-plane crossing computational grid |
| url | http://www.mdpi.com/2079-9268/8/3/31 |
| work_keys_str_mv | AT enriqueblair clocktopologiesformolecularquantumdotcellularautomata AT craiglent clocktopologiesformolecularquantumdotcellularautomata |