Effects of imperfect pulses on dynamical decoupling using quantum trajectory method

doi:10.1088/1674-1056/27/12/120303

Abstract

The dynamical decoupling (DD) method is widely adopted to preserve coherence in different quantum systems. In the case of ideal pulses, its effects on the suppression of noise can be analytically described by the mathematical form of filter function. However, in practical experiments, the unavoidable pulse errors limit the efficiency of DD. In this paper, we study the effects of imperfect pulses on DD efficiency based on quantum trajectories. By directly generating a pseudo noise sequence correlated in time, we can explore the performance of DD with different pulse errors in the typical noise environment. It shows that, for the typical 1/f noise environment, the phase error of operational pulses severely affects the performance of noise suppression, while the detuning and intensity errors have less influence. Also, we get the thresholds of these errors for efficient DD under the given experimental conditions. Our method can be widely applied to guide practical DD experimental implementation.

Keywords: pulse imperfections dynamical decoupling

Received: 23 July 2018
Revised: 18 October 2018
Accepted manuscript online:

PACS:	03.65.Yz	(Decoherence; open systems; quantum statistical methods)
	03.67.Pp	(Quantum error correction and other methods for protection against decoherence)
	02.60.-x	(Numerical approximation and analysis)

Fund:

Project supported by the National Basic Research Program of China (Grant No. 2016YFA0301903), the National Natural Science Foundation of China (Grant Nos. 11174370, 11304387, 61632021, 11305262, and 61205108), and the Research Plan Project of the National University of Defense Technology (Grant No. ZK16-03-04).

Corresponding Authors: Ping-Xing Chen
E-mail: pxchen@nudt.edu.cn

Cite this article:

Lin-Ze He(何林泽), Man-Chao Zhang(张满超), Chun-Wang Wu(吴春旺), Yi Xie(谢艺), Wei Wu(吴伟), Ping-Xing Chen(陈平形) Effects of imperfect pulses on dynamical decoupling using quantum trajectory method 2018 Chin. Phys. B 27 120303

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