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arXiv 2006.08002quant-phhep-thmath-phmath.MP
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近似恢复和相对熵I.广义von Neumann子代数

Approximate recovery and relative entropy I. general von Neumann subalgebras

Thomas Faulkner, Stefan Hollands, Brian Swingle, Yixu Wang

摘要:

我们证明了存在一个普遍的恢复通道,近似恢复状态的v.诺依曼子代数时,在相对熵的变化,相对于一个固定的参考状态,是小的。我们的结果是Junge等人[arXiv:1509.07127]应用于I型v. Neumann代数的先前结果的推广。我们大致遵循他们的证明策略,但在这里考虑任意v.诺依曼代数,其中出现了定性的新问题。我们的结果取决于某些解析向量的建设和计算/估计他们的荒木增田$L_p$规范。我们评论应用量子零能量条件。

英文摘要:

We prove the existence of a universal recovery channel that approximately recovers states on a v. Neumann subalgebra when the change in relative entropy, with respect to a fixed reference state, is small. Our result is a generalization of previous results that applied to type-I v. Neumann algebras by Junge at al. [arXiv:1509.07127]. We broadly follow their proof strategy but consider here arbitrary v. Neumann algebras, where qualitatively new issues arise. Our results hinge on the construction of certain analytic vectors and computations/estimations of their Araki-Masuda $L_p$ norms. We comment on applications to the quantum null energy condition.

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