Interference-Based Logic Gates
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UTER SCIENCE
Interference-Based Logic Gates S. A. Stepanenko Presented by Academician of the RAS Yu.A. Trutnev March 2, 2020 Received March 20, 2020; revised March 20, 2020; accepted May 18, 2020
Abstract—Interference-based logic gates serve as a basis for photonic computers intended (as distinct from quantum computers) for the same class of problems as electronic computers and making it possible to increase performance irrespective of the limitations inherent in electronic technologies. The proposed interference-based logic gates represent a complete basic functional set. They meet the requirement for the identity of intensity values corresponding to logic constants “0” and “1.” A method for intensity scaling is developed. Parameters of interference-based logic gates are estimated, and the advantages of such gates over their electronic counterparts are demonstrated. Keywords: interference-based logic gates, digital photonic devices DOI: 10.1134/S1064562420040183
In this paper, logic gates (LGs) are proposed whose operation is based on differences in coherent light intensities resulting from the interaction of light waves with each other and with LG waveguides. The LG parameters are estimated, and the capabilities of LGs as applied to the design of digital control and computing devices are demonstrated. In [1] the implementation principles of a universal photon computer were proposed and estimates of its performance, power consumption, and physical sizes were obtained, which demonstrated its advantages over electronic counterparts. These estimates were based on the parameters of logic gates, which perform operations over light signals. Active LGs involving nonlinear effects are inferior in performance and power consumption to modern electronic elements [2]. Available passive LGs [3–7] have short operation execution times, but suffer from technological shortcomings (differences in the LG sizes implementing various functions amount to only 0.4 nm [4]) or have other disadvantages, such as identical intensity values for different logical constants [3, 6, 7], the need for low temperature (Т ≈ 3 K), or long relaxation [5]. Below, we propose passive interference-based LGs that rely on differences in light intensity values resulting from the interference of coherent light waves and
Russian Federal Nuclear Center–All-Russia Research Institute of Experimental Physics, Sarov, Nizhny Novgorod oblast, 607188 Russia e-mail: [email protected]
their interaction with waveguides. The parameter estimates for these LGs are competitive with their electronic analogues. Application of interference-based LGs to the creation of photon computers intended (in contrast to quantum computers) for the same class of problems as electronic computers makes it possible to increase performance irrespective of the limitations inherent in electronic technologies. 1. IDENTIFICATION OF LOGIC CONSTANTS LGs carry out operations over coherent electromagnetic waves. Operands and results of operations are logical constants: zero (“0”) and one (“1”). They are i
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