Structural basis of multistationary quantum systems. I. Effective single-particle dynamics

Obermayer, K; Teich, Werner G.; Mahler, Guenter

doi:10.1103/physrevb.37.8096

Cited by 50 publications

(28 citation statements)

References 33 publications

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“…There have been numerous ideas for physical implementation of the T-F gate [47][48][49]. What we have described above is the first SSL implementation.…”

Section: The Toffoli-fredkin Gate With Sslmentioning

confidence: 99%

Information Processing with Electron Spins

Bandyopadhyay

2012

ISRN Materials Science

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Information processors process information in a variety of ways. The human brain processes information through a highly interconnected system of neurons and synapses, while a digital computer processes information by having a binary switch toggle on and off in response to a stream of binary bits. The "switch" is the most primitive unit of the modern computer. The better it is (faster, more energy efficient, more reliable, etc.), the more advanced is the computer hardware. Energy efficiency, however, is more important than any other attribute, not so much because energy is costly, but because too much energy dissipation prevents increasing the density of switches on a chip that is necessary to make the chip increasingly more powerful. Reducing dissipation entails radically new and often revolutionary approaches for implementing the switch. One such approach is to encode digital bit information in the spin polarization of a single electron (or ensemble of electrons) and then using two mutually antiparallel polarizations to represent the binary bits 0 and 1. Switching between the bits can be accomplished by simply flipping the polarizations of the spins, which takes very little energy. Such switches are extremely energy efficient if designed properly, but they are somewhat slower than traditional transistor-based switches and can be more error prone. This paper discusses the pros and cons of spin-based switches and introduces the reader to the most recent advancements in information processing predicated on encoding information in electron spin polarization.

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“…There have been numerous ideas for physical implementation of the T-F gate [47][48][49]. What we have described above is the first SSL implementation.…”

Section: The Toffoli-fredkin Gate With Sslmentioning

confidence: 99%

Information Processing with Electron Spins

Bandyopadhyay

2012

ISRN Materials Science

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“…The potential for such structures as a realization of a CA has been considered in some detail in Ref. [3] and will be briefly summarized here. We use the notation x-y-z to refer to a cell in state y whose left and right neighbors are in states x and z respectively (for a circular CA, the sequence of cells x-y-z runs clockwise).…”

mentioning

confidence: 99%

“…A number of theoretical studies (e.g. [1][2][3][4]) have proposed novel processing systems of this kind. These structures have a certain feature in common: they consist of a large number of identical cellular units.…”

mentioning

confidence: 99%

“…One possible cell would be the bistable double-quantum-dot, driven through its internal states by laser pulses [3]. The beam would encompass the whole ACA and update all cells that respond to its frequency; a single laser could drive a large number of independent ACA devices.…”

mentioning

confidence: 99%

“…[3] by using three rather than two sizes of cell and correspondingly three inter-cell distances. A system of this kind is shown schematically in Fig.…”

mentioning

confidence: 99%

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A possible nanometer-scale computing device based on an adding cellular automaton

Benjamin

Johnson

1997

Applied Physics Letters

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We present a simple one-dimensional Cellular Automaton (CA) which has the property that an initial state composed of two binary numbers evolves quickly into a final state which is their sum. We call this CA the Adding Cellular Automaton (ACA). The ACA requires only 2N two-state cells in order to add any two N − 1 bit binary numbers. The ACA could be directly realized as a wireless nanometer-scale computing device -a possible implementation using coupled quantum dots is outlined.

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Molecular materials II Part B. Molecular electronics?

Miller

1990

Advanced Materials

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Assuming that a suitable bistable molecule can actually be reliably synthesized and is chemically sufficiently stable, the major areas of concern are the errors in knowing or setting the switch state of the bistable molecule which arise from quantum fluctuations, and heat dissipation, as well as addressing (input/output contacts) limitations. Thermal degradation via bond breaking is also a concern.["* 331 For optical read/write systems the typical less than unit absorption (quantum yield), photochemical bond breaking, and switching errors are potentially additional limitations.t331 It must not be construed that stable molecular based materials of sufficient purity, be they organic, organometallic, polymers, or inorganic coordination complexes, are easily and reproducibly prepared. These are enormous research projects unto themselves. For the sake of argument, however, we will assume that these are surmountable challenges.

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Structural basis of multistationary quantum systems. I. Effective single-particle dynamics

Cited by 50 publications

References 33 publications

Information Processing with Electron Spins

Information Processing with Electron Spins

A possible nanometer-scale computing device based on an adding cellular automaton

Molecular materials II Part B. Molecular electronics?

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