33 citations · 72 across the 7 of their papers we have counts for
7 papers · 1 filter
Perfect transmission and parallel composition for quantum walks on graphs with two leads
Allan John Gerrard, Ryo Asaka, Kazumitsu Sakai
We study scattering for continuous-time quantum walks on finite graphs with two attached leads. We derive explicit formulae for the two-terminal scattering matrix in terms of chara…
Toward fault-tolerant quantum computation exploiting quantum spatial distribution and gauge symmetry
Ryo Asaka
We explore how the integrated use of quantum spatial distribution (QSD), or more specifically, a superposition of both spin and position states of particles, and gauge symmetry (GS…
Quantum error correction via multi-particle discrete-time quantum walk
Ryo Asaka, Ryusei Minamikawa
We propose a scheme of quantum error correction that employs a multi-particle quantum walk defined on nested squares, each hosting a single particle. In this model, each particle m…
Two-level Quantum Walkers on Directed Graphs II: An Application to qRAM
Ryo Asaka, Kazumitsu Sakai, Ryoko Yahagi
This is the second paper in a series of two. Using a multi-particle continuous-time quantum walk with two internal states, which has been formulated in the first paper (arXiv:2112.…
Two-level Quantum Walkers on Directed Graphs I: Universal Quantum Computing
Ryo Asaka, Kazumitsu Sakai, Ryoko Yahagi
In the present paper, the first in a series of two, we propose a model of universal quantum computation using a fermionic/bosonic multi-particle continuous-time quantum walk with t…
Quantum random access memory via quantum walk
Ryo Asaka, Kazumitsu Sakai, Ryoko Yahagi
A novel concept of quantum random access memory (qRAM) employing a quantum walk is provided. Our qRAM relies on a bucket brigade scheme to access the memory cells. Introducing a bu…
Quantum circuit for the fast Fourier transform
Ryo Asaka, Kazumitsu Sakai, Ryoko Yahagi
We propose an implementation of the algorithm for the fast Fourier transform (FFT) as a quantum circuit consisting of a combination of some quantum gates. In our implementation, a…