A quantum walk in phase space with resonator-assisted double quantum dots

doi:10.1088/1674-1056/25/2/020307

Abstract

We implement a quantum walk in phase space with a new mechanism based on the superconducting resonator-assisted double quantum dots. By analyzing the hybrid system, we obtain the necessary factors implementing a quantum walk in phase space: the walker, coin, coin flipping and conditional phase shift. The coin flipping is implemented by adding a driving field to the resonator. The interaction between the quantum dots and resonator is used to implement conditional phase shift. Furthermore, we show that with different driving fields the quantum walk in phase space exhibits a ballistic behavior over 25 steps and numerically analyze the factors influencing the spreading of the walker in phase space.

Keywords: quantum walks double quantum dots

Received: 11 August 2015
Revised: 04 October 2015
Accepted manuscript online:

PACS:	03.67.Ac	(Quantum algorithms, protocols, and simulations)
	42.50.Pq	(Cavity quantum electrodynamics; micromasers)
	74.50.+r	(Tunneling phenomena; Josephson effects)

Fund:

Project supported by the National Natural Science Foundation of China (Grant No. 11474049) and CAST Innovation Fund.

Corresponding Authors: Peng Xue
E-mail: gnep.eux@gmail.com

Cite this article:

Zhi-Hao Bian(边志浩), Hao Qin(秦豪), Xiang Zhan(詹翔), Jian Li(李剑), Peng Xue(薛鹏) A quantum walk in phase space with resonator-assisted double quantum dots 2016 Chin. Phys. B 25 020307

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