Quantum entanglement in multi-field inflation
Quantum entanglement in multi-field inflation
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DOI：
10.1088/1475-7516/2018/09/004
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发表时间：
2018-05
影响因子：
6.4
通讯作者：
Nadia Bolis;Tomohiro Fujita;S. Mizuno;S. Mukohyama
中科院分区：
文献类型：
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作者：
Nadia Bolis;Tomohiro Fujita;S. Mizuno;S. Mukohyama
我们研究了多场暴胀中量子纠缠的出现。在这种情况下，一个场的扰动导致了可观测的曲率扰动，而其他场的多场动力学通过粒子产生和纠缠来影响曲率扰动。我们发展了一个一般的形式，定义了海森堡和Schrödinger图像中多场摄动之间的量子纠缠，并表明在多场暴胀情景中，不同场之间的纠缠可以动态产生。我们还提出了一个简单的模型，其中标量场的动力学矩阵的突然变化产生纠缠，并且在膨胀扰动的功率谱中出现振荡特征。
We study the emergence of quantum entanglement in multi-field inflation. In this scenario, the perturbations of one field contribute to the observable curvature perturbation, while multi-field dynamics with the other fields affect the curvature perturbation through particle production and entanglement. We develop a general formalism which defines the quantum entanglement between the perturbations of the multiple fields both in the Heisenberg and Schrödinger pictures, and show that entanglement between different fields can arise dynamically in the context of multi-field inflationary scenarios. We also present a simple model in which a sudden change in the kinetic matrix of the scalar fields generates entanglement and an oscillatory feature appears in the power spectrum of the inflaton perturbation.