论文标题
关于量子转向和维格尼
On Quantum Steering and Wigner Negativity
论文作者
论文摘要
量子相关性和Wigner负性是连续变化量子系统中非经典性的两个重要特征。在这项工作中，我们调查了如何在有条件产生的wigner否定性的背景下交织在一起。以前证明，当爱丽丝和鲍勃共享一个高斯州时，鲍勃可以在他的系统上进行一些测量，以在爱丽丝的身边造成wigner否定性，并且只有在爱丽丝到鲍勃的高斯转向。在这项工作中，我们试图将这些发现概括为爱丽丝和鲍勃共享非高斯国家的更广泛的场景。我们表明，如果爱丽丝最初可以用Wigner阳性测量结果引导Bob的系统，那么Bob可以在Alice的子系统中远程造成Wigner的负性。即使这表明量子转向已经足够，我们也表明，量子相关性通常不是有条件地产生Wigner负性的必要条件。
Quantum correlations and Wigner negativity are two important signatures of nonclassicality in continuous-variable quantum systems. In this work, we investigate how both are intertwined in the context of the conditional generation of Wigner negativity. It was previously shown that when Alice and Bob share a Gaussian state, Bob can perform some measurement on his system to create Wigner negativity on Alice's side if and only if there is Gaussian steering from Alice to Bob. In this work, we attempt to generalise these findings to a much broader class of scenarios on which Alice and Bob share a non-Gaussian state. We show that if Alice can initially steer Bob's system with Wigner-positive measurements, Bob can remotely create Wigner negativity in Alice's subsystem. Even though this shows that quantum steering is sufficient, we also show that quantum correlations are in general not necessary for the conditional generation of Wigner negativity.
