Entanglement-assisted local operations and classical communications conversion in quantum critical systems

Entanglement-assisted local operations and classical communications conversion in quantum critical systems
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量子临界系统中的纠缠辅助局部操作和经典通信转换

DOI:
10.1103/physreva.85.022338
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发表时间:
2011-11
期刊:
影响因子:
2.9
通讯作者:
Heng Fan
Heng Fan
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
J. Cui;J. P. Cao;Heng Fan

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研究了量子临界系统中基态之间通过纠缠辅助局域操作和经典通信的相互转换。我们提出了另一种方法来揭示不同的可转换性时,量子相变发生的本地操作。本文研究了一维横场伊辛模型、XY模型和XXZ模型的基态局域可转换性。研究发现,在相变点处,相变点的可兑换性发生突变。在横场伊辛模型中,第一激发态和基态之间的相互作用转换率对于不同的相位也是不同的。讨论了量子相变的阶数与局域可转换性之间的关系。
Conversions between the ground states in quantum critical systems via entanglement-assisted local operations and classical communications (ELOCC) are studied. We propose an alternative method to reveal the different convertibility by local operations when a quantum phase transition occurs. We have studied the ground-state local convertibility in the one-dimensional transverse field Ising model, XY model and XXZ model. It is found that the ELOCC convertibility suddenly changes at the phase transition points. In the transverse field Ising model the ELOCC convertibility between the first-excited state and the ground state are also distinct for different phases. The relation between the order of quantum phase transitions and the local convertibility is discussed.
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