摘要We study evolution of entanglement in an XY-type spin channel and find that the entanglement can be enhanced by the spin channel. The parameter regions of the initial states for different numbers of sites are obtained. Furthermore, we consider a common spin environment coupling to the spin chains and find that the entanglement enhancement can also be implemented only for the chains with the odd numbers of sites.
Abstract：We study evolution of entanglement in an XY-type spin channel and find that the entanglement can be enhanced by the spin channel. The parameter regions of the initial states for different numbers of sites are obtained. Furthermore, we consider a common spin environment coupling to the spin chains and find that the entanglement enhancement can also be implemented only for the chains with the odd numbers of sites.
SU Xiao-Qiang**
. Entanglement Enhancement in an XY Spin Chain[J]. 中国物理快报, 2011, 28(5): 50309-050309.
SU Xiao-Qiang**
. Entanglement Enhancement in an XY Spin Chain. Chin. Phys. Lett., 2011, 28(5): 50309-050309.
[1] Li Y et al 2005 Phys. Rev. A 71 022301
Zhou X et al 2002 Phys. Rev. Lett. 89 197903
Mohseni M and Lidar D A 2005 Phys. Rev. Lett. 94 040507
Yeo Y 2003 Phys. Rev. A 68 022316
[2] Bose S 2003 Phys. Rev. Lett. 91 207901
[3] Christandl M et al 2004 Phys. Rev. Lett. 92 187902
Avellino M, Fisher A J and Bose S 2006 Phys. Rev. A 74 012321
Wang Z M, Byrd M S, Shao B and Zou J 2009 Phys. Rev. A 80 022330
Schirmer S G and Pemberton-Ross P J 2009 Phys. Rev. A 80 030301(R)
Bishop C A, Ou Y C, Wang Z M and Byrd M S 2010 Phys. Rev. A 81 042313
[4] Barjaktarevic J P, McKenzie R H, Links J and Milburn G J 2005 Phys. Rev. Lett. 95 230501
[5] Bennett C H, Bernstein H J, Popescu S and Schumacher B 1996 Phys. Rev. A 53 2046
[6] Bennett C H, Brassard G, Popescu S, Schumacher B, Smolin J A and Wootters W K 1996 Phys. Rev. Lett. 76 722
[7] Brádler K and Jáuregui R 2007 J. Phys. B: At. Mol. Opt. Phys. 40 743
[8] Peskin U, Huang Z and Kais S 2007 Phys. Rev. A 76 012102
[9] Tan H T and Deng W W 2009 Chin. Phys. Lett. 26 094205
[10] Su X Q, Wang A M, Ma X S and Qiu L 2007 J. Phys. A: Math. Theor. 40 11385
[11] Wootters W K 1998 Phys. Rev. Lett. 80 2245
[12] Cai J M, Zhou Z W and Guo G C 2006 Phys. Rev. A 74 022328
[13] Cucchietti F M, Paz J P and Zurek W H 2005 Phys. Rev. A 72 052113
[14] Zurek W H 1982 Phys. Rev. D 26 1862
[15] Nielsen M A and Chuang I L 2000 Quantum Computation and Quantum Information (Cambridge: Cambridge University)
2011, Vol. 28 
