Implementing Quantum Search Algorithm with Metamaterials.

Author: Zhang W1, Cheng K2,3, Wu C2,3, Wang Y2,3, Li H2,3, Zhang X1
1Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, 100081, Beijing, China.
2The Institute of Dongguan-Tongji University, Dongguan, Guangdong, 523808, China.
3School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.
Conference/Journal: Adv Mater.
Date published: 2017 Nov 17
Other: Special Notes: doi: 10.1002/adma.201703986. [Epub ahead of print] , Word Count: 178

Metamaterials, artificially structured electromagnetic (EM) materials, have enabled the realization of many unconventional EM properties not found in nature, such as negative refractive index, magnetic response, invisibility cloaking, and so on. Based on these man-made materials with novel EM properties, various devices are designed and realized. However, quantum analog devices based on metamaterials have not been achieved so far. Here, metamaterials are designed and printed to perform quantum search algorithm. The structures, comprising of an array of 2D subwavelength air holes with different radii perforated on the dielectric layer, are fabricated using a 3D-printing technique. When an incident wave enters in the designed metamaterials, the profile of beam wavefront is processed iteratively as it propagates through the metamaterial periodically. After ≈N roundtrips, precisely the same as the efficiency of quantum search algorithm, searched items will be found with the incident wave all focusing on the marked positions. Such a metamaterial-based quantum searching simulator may lead to remarkable achievements in wave-based signal processors.

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KEYWORDS: metamaterials; microwaves; quantum search algorithm

PMID: 29149508 DOI: 10.1002/adma.201703986