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Lower bounds on the computational power of an optical model of computation
Lower bounds on the computational power of an optical model of computation   (Citations: 10)
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We present lower bounds on the computational power of an optical model of computation called theC2-CSM. We show thatC2-CSM time is at least as powerful as sequential space, thus giving one of the two inclusions that are necessary to show that the model veries the parallel computation thesis. Furthermore we show that C2-CSMs that simultaneously use polynomial space and polylogarithmic time decide at least the class NC.
Journal: Natural Computing - NC , vol. 7, no. 1, pp. 95-108, 2008
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    • ...The machine implements a continuous space memory, instead of conventional computers digital memory [11]...
    • ...Basic machine operations are defined according to Fourier optics [11] and some efforts are done to implement the machine [12]...

    Sama Goliaeiet al. An Optical Wavelength-Based Solution to the 3SAT Problem

    • ...Our research is in the non-traditional direction, similar to e.g., [3,27,26,23,31,9,34,33,6,2], attempting to develop entirely new methods of computing that are not physically possible with electronics, and truly exploit the full parallel capabilities of light beams...

    Shlomi Dolevet al. Optical Designs for Non-deterministic Turing Machines

    • ...We have given upper [24] and lower [26] bounds on the computational power of the C2-CSM by showing that it verifies the parallel computation thesis...

    Damien Woodset al. Lower bounds on the computational power of an optical model of computa...

    • ...We have given lower bounds on the computational power of the C2-CSM by showing that it is at least as powerful as models that verify the parallel computation thesis [26, 29]...
    • ...Using this fact we nd that C2-CSMs that simultaneously use polynomial space and polylogarithmic time accept the class NC. Corollary 1 ([26, 29])...
    • ...3 This is in contrast to the proof of the previous lower bound proof [26, 29] where...
    • ...In previous work [26, 29] we used an image with value/range of k (and thus of dyRange k) as a counter for k iterations...

    Damien Woods. Optical Computing and Computational Complexity

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