Quantum Random Walks without a Coin Toss
量子物理
2007-05-23 v1
摘要
We construct a quantum random walk algorithm, based on the Dirac operator instead of the Laplacian. The algorithm explores multiple evolutionary branches by superposition of states, and does not require the coin toss instruction of classical randomised algorithms. We use this algorithm to search for a marked vertex on a hypercubic lattice in arbitrary dimensions. Our numerical and analytical results match the scaling behaviour of earlier algorithms that use a coin toss instruction.
引用
@article{arxiv.quant-ph/0506221,
title = {Quantum Random Walks without a Coin Toss},
author = {Apoorva Patel and K. S. Raghunathan and Pranaw Rungta},
journal= {arXiv preprint arXiv:quant-ph/0506221},
year = {2007}
}
备注
8 pages, RevTeX4, 5 figures. Invited lecture at the Workshop on Quantum Information, Computation and Communication (QICC-2005), IIT Kharagpur, India, February 2005