Optimized dynamical decoupling sequences in protecting two-qubit states

doi:10.1088/0953-4075/44/17/175501

CSpace

	Optimized dynamical decoupling sequences in protecting two-qubit states
	Pan, Yu 1,2; Xi, Zai-Rong 2; Gong, Jiangbin 1,3,4
	2011-09-14
发表期刊	JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
ISSN	0953-4075
卷号	44 期号:17 页码:8
摘要	Aperiodic dynamical decoupling (DD) sequences of p pulses are of great interest to decoherence control and have been recently extended from single-qubit to two-qubit systems. If the environmental noise power spectrum is made available, then one may further optimize aperiodic DD sequences to reach higher efficiency of decoherence suppression than known universal schemes. This possibility is investigated in this work for the protection of two-qubit states, using an exactly solvable pure dephasing model including both local and nonlocal noise. The performance of optimized DD sequences in protecting two-qubit states is compared with that achieved by nested Uhrig's DD (nested-UDD) sequences, for several different types of noise spectrum. Except for the cases with noise spectrum decaying slowly in the high-frequency regime, optimized DD sequences with tens of control pulses can perform orders of magnitude better than that of nested-UDD. A two-qubit system with highly unbalanced local noise is also examined to shed more light on a recent experiment. Possible experiments that may be motivated by this work are discussed.
DOI	10.1088/0953-4075/44/17/175501
语种	英语
资助项目	Faculty of Science, National University Singapore ; NUS 'YIA'[R-144-000-195-101] ; National Nature Science Foundation of China[61074051] ; National Nature Science Foundation of China[60821091]
WOS研究方向	Optics ; Physics
WOS类目	Optics ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000294891500021
出版者	IOP PUBLISHING LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/12374
专题	中国科学院数学与系统科学研究院
通讯作者	Pan, Yu
作者单位	1.Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore 2.Chinese Acad Sci, Key Lab Syst & Control, Inst Syst Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China 3.Natl Univ Singapore, Ctr Computat Sci & Engn, Singapore 117542, Singapore 4.NUS Grad Sch Integrat Sci & Engn, Singapore 117597, Singapore
推荐引用方式 GB/T 7714	Pan, Yu,Xi, Zai-Rong,Gong, Jiangbin. Optimized dynamical decoupling sequences in protecting two-qubit states[J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,2011,44(17):8.
APA	Pan, Yu,Xi, Zai-Rong,&Gong, Jiangbin.(2011).Optimized dynamical decoupling sequences in protecting two-qubit states.JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,44(17),8.
MLA	Pan, Yu,et al."Optimized dynamical decoupling sequences in protecting two-qubit states".JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 44.17(2011):8.