Katariya Vishal, Bhusal Narayan, You Chenglong
Hearne Institute for Theoretical Physics, Department of Physics & Astronomy, and Center for Computation & Technology, Louisiana State University, Baton Rouge, LA 70803, USA.
Quantum Photonics Laboratory, Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA.
Sensors (Basel). 2023 Jul 21;23(14):6570. doi: 10.3390/s23146570.
Guesswork is an information-theoretic quantity which can be seen as an alternate security criterion to entropy. Recent work has established the theoretical framework for guesswork in the presence of quantum side information, which we extend both theoretically and experimentally. We consider guesswork when the side information consists of the BB84 states and their higher-dimensional generalizations. With this side information, we compute the guesswork for two different scenarios for each dimension. We then performed a proof-of-principle experiment using Laguerre-Gauss modes to experimentally compute the guesswork for higher-dimensional generalizations of the BB84 states. We find that our experimental results agree closely with our theoretical predictions. This work shows that guesswork can be a viable security criterion in cryptographic tasks and is experimentally accessible in a number of optical setups.
猜测工作是一种信息论量，可被视为熵的替代安全标准。最近的工作已经建立了存在量子边信息时猜测工作的理论框架，我们在理论和实验上都对其进行了扩展。当边信息由BB84态及其高维推广形式组成时，我们考虑猜测工作。利用这些边信息，我们针对每个维度计算两种不同情形下的猜测工作。然后，我们使用拉盖尔 - 高斯模式进行了原理验证实验，以通过实验计算BB84态高维推广形式的猜测工作。我们发现实验结果与理论预测非常吻合。这项工作表明，猜测工作在加密任务中可以是一个可行的安全标准，并且在许多光学设置中都可以通过实验实现。
