Quantum entanglement and teleportation in higher dimensional black hole spacetimes
Quantum entanglement and teleportation in higher dimensional black hole spacetimes
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DOI：
10.1088/0264-9381/25/7/075011
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发表时间：
2007-07
影响因子：
3.5
通讯作者：
Xian-Hui Ge;Sang Pyo Kim
中科院分区：
文献类型：
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作者：
Xian-Hui Ge;Sang Pyo Kim
我们研究了在静止和旋转的额外维弯曲时空背景下量子纠缠和量子隐形传态的性质。我们证明了由于著名的Hawking-Unruh效应，惯性系中的最大纠缠Bell态在弯曲空间中的纠缠度降低。纠缠度随着额外维的增加而降低。对于一个有限的黑洞表面引力，观测者可以选择一个更高的频率模式来保持高水平的纠缠。量子隐形传态的保真度也因为霍金-昂鲁效应而降低。我们讨论了玻色子和费米子源的保真度作为额外维度、模式频率、黑洞质量和黑洞角动量参数的函数。
We study the properties of quantum entanglement and teleportation in the background of stationary and rotating curved spacetimes with extra dimensions. We show that a maximally entangled Bell state in an inertial frame becomes less entangled in curved space due to the well-known Hawking–Unruh effect. The degree of entanglement is found to be degraded with the increase in the extra dimensions. For a finite black hole surface gravity, the observer may choose a higher frequency mode to keep high level entanglement. The fidelity of quantum teleportation is also reduced because of the Hawking–Unruh effect. We discuss the fidelity as a function of extra dimensions, mode frequency, black hole mass and black hole angular momentum parameter for both bosonic and fermionic resources.