Notes on teleportation in an expanding space

Notes on teleportation in an expanding space
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关于在扩展空间中传送的注意事项

DOI:
10.1016/j.physletb.2013.01.026
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发表时间:
2012-10
期刊:
影响因子:
4.4
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:
Jun Feng;Wen-Li Yang;Yao-Zhong;Heng Fan

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我们研究了de Sitter空间中共形探测器Alice和惯性探测器Bob之间的量子隐形传态,(i)一种是利用自由标量模,(ii)一种是利用腔存储量子比特.我们表明,在这两种情况下,对鲍勃的隐形传态的保真度下降。虽然在方案(i)中,纠缠度损失是由于与他的宇宙视界相关的Gibbons-Hawking效应,但在方案(ii)中,纠缠度降低,因为时空曲率降低了纠缠腔的能力。与标准的Bunch-Davies选择相比,我们还表明,可能的普朗克物理引起额外的修改的保真度的隐形传态协议在这两个方案中。
We investigate the quantum teleportation between a conformal detector Alice and an inertial detector Bob in de Sitter space in two schemes, (i) one uses free scalar modes and (ii) one utilizes cavity to store qubit. We show that the fidelity of the teleportation is degraded for Bob in both cases. While the fidelity-loss is due to the Gibbons–Hawking effect associated with his cosmological horizon in the scheme (i), the entanglement decreases in the scheme (ii) because the ability to entangle the cavities is reduced by the spacetime curvature. With a cutoff at Planck-scale, comparing with the standard Bunch–Davies choice, we also show that the possible Planckian physics cause extra modifications to the fidelity of the teleportation protocol in both schemes.
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