کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4590012 | 1334927 | 2014 | 39 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectral and asymptotic properties of Grover walks on crystal lattices
ترجمه فارسی عنوان
خواص طیفی و معکوس گرور بر روی شبکه های کریستال پیاده می شود
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کلمات کلیدی
کوانتومی پیاده می رود، شبکه های کریستال، قضیه تطبیق طیفی، قضیه محدود ضعیف،
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
اعداد جبر و تئوری
چکیده انگلیسی
We propose a twisted Szegedy walk for estimating the limit behavior of a discrete-time quantum walk on a crystal lattice, an infinite abelian covering graph, whose notion was introduced by [14]. First, we show that the spectrum of the twisted Szegedy walk on the quotient graph can be expressed by mapping the spectrum of a twisted random walk onto the unit circle. Secondly, we show that the spatial Fourier transform of the twisted Szegedy walk on a finite graph with appropriate parameters becomes the Grover walk on its infinite abelian covering graph. Finally, as an application, we show that if the Betti number of the quotient graph is strictly greater than one, then localization is ensured with some appropriated initial state. We also compute the limit density function for the Grover walk on Zd with flip flop shift, which implies the coexistence of linear spreading and localization. We partially obtain the abstractive shape of the limit density function: the support is within the d-dimensional sphere of radius 1/d, and 2d singular points reside on the sphere's surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Functional Analysis - Volume 267, Issue 11, 1 December 2014, Pages 4197-4235
Journal: Journal of Functional Analysis - Volume 267, Issue 11, 1 December 2014, Pages 4197-4235
نویسندگان
Yusuke Higuchi, Norio Konno, Iwao Sato, Etsuo Segawa,