论文标题
用量子Cheshire Cat隔离噪声和放大信号
Isolating noise and amplifying signal with quantum Cheshire cat
论文作者
论文摘要
所谓的量子cheshire猫是一种现象，其中用“猫”识别的对象与用猫的“ grin”识别的对象的特性分离。我们提出了一个类似于这种现象的思想实验，并进行了干涉测量设置，其中一个物体（光子）（光子）的特性（一个极化的成分）可以与对象本身分开，并且当它已经与其对象脱钩时可以同时放大。我们进一步表明，该设置可用于解离两个互补特性，例如，光子的极化的两个正交成分，并与猫的笑容和猫的咆哮一起识别，彼此之间可以放大，而其中一个可以放大。此外，我们将工作扩展到嘈杂的场景，这是由旋转轨道耦合耦合的类似于哈密顿式的额外相互作用项来进行的，以进行测量过程，在这种情况下，该对象被所谓的困惑的柴郡猫识别出来。我们设计了一个Gedanken实验，其中这种“混乱”可以成功地与系统分离，我们发现解离有助于信号的扩增。
The so-called quantum Cheshire cat is a phenomenon in which an object, identified with a "cat", is dissociated from a property of the object, identified with the "grin" of the cat. We propose a thought experiment, similar to this phenomenon, with an interferometric setup, where a property (a component of polarization) of an object (photon) can be separated from the object itself and can simultaneously be amplified when it is already decoupled from its object. We further show that this setup can be used to dissociate two complementary properties, e.g., two orthogonal components of polarization of a photon and identified with the grin and the snarl of a cat, from each other and one of them can be amplified while being detached from the other. Moreover, we extend the work to a noisy scenario, effected by a spin-orbit-coupling -like additional interaction term in the Hamiltonian for the measurement process, with the object in this scenario being identified with a so-called confused Cheshire cat. We devise a gedanken experiment in which such a "confusion" can be successfully dissociated from the system, and we find that the dissociation helps in the amplification of signals.
