论文标题
使用单个量子粒子任意携带大量信息
Carrying an arbitrarily large amount of information using a single quantum particle
论文作者
论文摘要
从理论上讲，光子可以在进入检测器之前任意旅行，从而单击。光子可以携带多少信息？我们研究了两项不对称的“双向信号传导”方案，作为Del Santo和Dakić提出的延伸。假设爱丽丝和鲍勃彼此之间相距遥远，并且每个人都有一个$ n $ bit的字符串。他们的任务是在通信过程中仅使用一个光子来交换其本地N位字符串的信息。已经表明，在马赫 - 齐汉德（MZ）干涉仪中，不同空间位置的叠加启用了两分的局部编码。我们表明，在我们的协议中通过$ n $级别的MZ干涉仪的级联传播光子之后，Alice或Bob的检测器点击可以访问对方的$ N $ -BIT字符串的完整信息，而另一个可以获取一位信息。也就是说，波颗粒二元性使双向信号传导成为可能，并且单个光子可以任意传递大（但有限）的信息。
Theoretically speaking, a photon can travel arbitrarily long before it enters into a detector, resulting a click. How much information can a photon carry? We study a bipartite asymmetric "two-way signaling" protocol as an extension of that proposed by Del Santo and Dakić. Suppose that Alice and Bob are distant from each other and each of them has an $n$-bit string. They are tasked to exchange the information of their local n-bit strings with each other, using only a single photon during the communication. It has been shown that the superposition of different spatial locations in a Mach-Zehnder (MZ) interferometer enables bipartite local encodings. We show that, after the travel of a photon through a cascade of $n$-level MZ interferometers in our protocol, the one of Alice or Bob whose detector clicks can access the other's full information of $n$-bit string, while the other can gain one-bit of information. That is, the wave-particle duality makes two-way signaling possible, and a single photon can carry arbitrarily large (but finite) information.
