Decoherence in a one-dimensional quantum walk

被引：43
作者：
Annabestani, Mostafa [1 ]
Akhtarshenas, Seyed Javad [2 ,3 ]
Abolhassani, Mohamad Reza [1 ]
机构：
[1] Tarbiat Modares Univ, Basic Sci Fac, Dept Phys, Tehran, Iran
[2] Univ Isfahan, Dept Phys, Esfahan, Iran
[3] Univ Isfahan, Quant Lab Grp, Esfahan, Iran
来源：
PHYSICAL REVIEW A | 2010年 / 81卷 / 03期
关键词：
D O I：
10.1103/PhysRevA.81.032321
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this article we study decoherence in the discrete-time quantum walk on the line. We generalize the method of decoherent coin quantum walk, introduced by Brun et al. [Phys. Rev. A 67, 32304 (2003)]. Our analytical expressions are applicable for all kinds of decoherence. As an example of the coin-position decoherence, we study the broken line quantum walk and compare our results with the numerical one. We also show that our analytical results reduce to the Brun formalism when only the coin is subjected to decoherence.
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页数：9
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