欢迎登录材料期刊网

材料期刊网

高级检索

利用共生纠缠度比较详细地研究了超导耦合量子比特在非马尔可夫环境下纠缠消相干的演化.研究结果表明:对于不同纠缠初态下的超导耦合量子比特,由于环境作用的记忆反馈效应,处于热平衡环境中的耦合量子比特的纠缠度总是会单调地趋向于零.进一步的研究结果还表明:在非马尔可夫过程中会很快地出现纠缠的突然死亡,耗散越强,纠缠的死亡越快;而在马尔可夫过程中则是缓慢地趋向纠缠的死亡.

参考文献

[1] Yang C P,Hart S.Rotation gate for a three-level superconducting quantum interference device qubit with resonant interaction[J].Phys.Rev.A,2006,74(4):044302.
[2] Ji Y H,Hu J J,Cai S H.Investigation comparison on the gate speed of three-level and two-level quantum NOT gates with asymmetric potential of rf-SQUID[J].Mod.Phys.Lett.B,2007,21(19):1261-1270.
[3] Li Z X,Zou J,Cai J F,et al.Entanglement between charge qubit and quantized field[J].Acta Phys.Sin.(物理学报),2006,55(4):1580-1584 (in Chinese).
[4] Ji Y H,et al.Relation between quantum NOT gate speed and asymmetry of the potential of If-SQUID[J].Chin.Phys.B,2008,17(2):440-444.
[5] Burkard G,Koch R H,et al.Multilevel quantum description of decoherence in superconducting qubits[J].Phys.Rev.B,2004,69(6):064503.
[6] Yu T,Eberly J H.Finite-time disentanglement via spontaneous emission[J].Phys.Rev.Lett.,2004,93 (14):140404.
[7] Yu T,Eberly J H.Sudden death of entanglement[J].Science,2009,323(5914):598-601.
[8] Benatti F,Floreanini R.Entangling oscillators through environment noise[J].J.Phys.A,2006,39(11):2689-2699.
[9] Bellomo B,Lo Franco R,Compagno G.Entanglement dynamics of two independent qubits in environments with and without memory[J].Phys.Rev.A,2008,77(3):032342.
[10] Sinayskiy I,Ferraro E,Napoli A,et al.Non-Markovian dynamics of interacting qubit pair coupled to two independent Bosonic baths[J].J.Phys.A:Math.Thero.,2009,42:485301.
[11] Wootters W K.Entanglement of formation of an arbitrary state of two qubits[J].Phys.Rev.Left.,1998,80(10):2245-2248.
[12] Ikram M,Li F L,et al.Disentanglement in a two-qubit system subjected to dissipation environments[J].Phys.Rev.A,2007,75(6):062336.
[13] Scala M,Militello B,Messina A.Non-Markovian dynamics of cavity losses[J].Int.J.Quant.Inf.,2009,7:41-47.
[14] Werner R F.Quantum states with Einstein-Podolsky-Rosen correlations admitting a hidden-variable model[J].Phys.Rev.A,1989,40(8):4277-4281.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%