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arXiv 1805.09448astro-ph.COgr-qchep-th
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多场暴胀中的量子纠缠

Quantum Entanglement in Multi-field Inflation

Nadia Bolis, Tomohiro Fujita, Shuntaro Mizuno, Shinji Mukohyama

摘要:

我们研究了多场暴胀中量子纠缠的出现。在这种情况下,一个场的扰动有助于可观察到的曲率扰动,而与其他场的多场动力学通过粒子产生和纠缠影响曲率扰动。我们发展了一个一般的形式主义,它定义了在海森堡和薛定谔图像的多个场的微扰之间的量子纠缠,并表明,不同的领域之间的纠缠可以动态地出现在多场暴胀的情况下。我们还提出了一个简单的模型,其中的标量场的动力学矩阵的突然变化产生纠缠和暴胀子扰动的功率谱中出现的振荡功能。

英文摘要:

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.

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