几何测量量子失协是量子关联的一种表达形式.结合利用量子纠缠和几何量子失协,运用解析和数值模拟的方法,对非马尔科夫过程中耦合量子比特系统的量子关联动力学特性进行了比较研究.研究结果表明,在一定的初始态下,由于环境耗散作用的存在,量子纠缠和几何量子失协都随时间做递减的动力学演化,但几何量子失协比量子纠缠的递减要慢一些.表明几何量子失协的生存时间长于量子纠缠,更能抵抗环境的耗散作用、鲁棒性更好.因此,量子关联也是实现量子信息处理的有用资源.
参考文献
| [1] | Qasimi A Al,James D F V.Comparison of the attempts of quantum discord and quantum entanglement to capture quantum correlations[J].Phys.Rev.A,2011,83:032101. |
| [2] | Hamma A,Santra S,Zanardi P.Quantum entanglement in random physical states[J].Phys.Rev.Lett.,2012,109:040502. |
| [3] | Ji Yinghua,Xu Lin.Entanglement decoherence of coupled superconductor qubits entangled states in nonMarkovian environment[J].Chinese Journal of Quantum Electronics(量子电子学报),2011,28(1):58-64 (in Chinese). |
| [4] | Datta A,Shaji A,Caves M.Quantum discord and the power of one qubit[J].Phys.Rev.Lett.,2008,100:050502. |
| [5] | Lanyon B P,Barbieri M,Almeida M P,et al.Experimental quantum computing without entanglement[J].Phys.Rev.Lett.,2008,101:200501. |
| [6] | Yu T,Eberly J H.Sudden death of entanglement[J].Science,2009,323:598-601. |
| [7] | Shi Mingjun,Sun Chunxiao,et al.Optimal measurement for quantum discord of two-qubit states[J].Phys.Rev.A,2012,85:064104. |
| [8] | Cui J,Fan H J.Correlations in the Grover search[J].Phys.A:Math.Theor.,2010,43:045305. |
| [9] | Rong Xing,Wang Zixiang,Jin Fangzhou,et al.Quantum discord for investigating quantum correlations without entanglement in solids[J].Phys.Rev.B,2012,86:104425. |
| [10] | Werlang T,Rigolin G.Thermal and magnetic quantum discord in Heisenberg models[J].Phys.Rev.A,2010,81:044101. |
| [11] | Olliver H,Zurek W H.Quantum discord:A measure of the quantumness of correlations[J].Phys.Rev.Lett.,2001,88:017901. |
| [12] | Alipour S,Mani A,Rezakhani A T.Quantum discord and non-Markovianity of quantum dynamics[J].Phys.Rev.A,2012,85:052108. |
| [13] | Luo S.Quantum discord for two-qubit systems[J].Phys.Rev.A,2008,77:042303. |
| [14] | Sarandy M S.Classical correlation and quantum discord in critical systems[J].Phys.Rev.A,2009,80:022108. |
| [15] | Dakic B,Vedral V,Brukner C.Necessary and sufficient condition for nonzero quantum discord[J].Phys.Rev.Left.,2010,105:190502. |
| [16] | Debarba T,Maciel T O,Vianna R O.Witnessed entanglement and geometric measure of quantum discord[J].Phys.Rev.A,2012,86:024302. |
| [17] | Verstraete F,Audenaert K,Moor B D.Maximally entangled mixed states of two qubits[J].Phys.Rev.A,2001,64:012316. |
| [18] | Wang Xiaoyun,Ding Bangfu,Zhao heping.Quantum discord dynamics of non-coupled two-qubit system interacting with reserviors[J].Chinese Journal of Quantum Electronics(量子电子学报),2012,29(3):323-329(in Chinese). |
| [19] | Ji Y H,Hu Y,Yu Y X.Entanglement and decoherence of coupled superconductor qubits in contact with a common environment[J].Int.J.Theor.Phys.,2011,50:3313-3321. |
| [20] | Wootters W K.Entanglement of formation of an arbitrary state of two qubits[J].Phys.Rev.Lett.,1998,80(10):2245-2248. |
| [21] | Wu Shengjun.Correlation measures in bipartite states and entanglement irreversibility[J].Phys.Rev.A,2012,86:012329. |
| [22] | Piani M.Problem with geometric discord[J].Phys.Rev.A,2012,86:034101. |
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：
-
10%
-
20%
-
30%
-
40%
-
50%